Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3db937bcc71830…

MALICIOUS

PDF

54.9 KB Created: 2020-10-25 13:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b88bb4c8e4aa8192a5ce27423c7d6c96 SHA-1: e946c01db3295a7cd7f2025a07a3b82109687ef5 SHA-256: 5a3db937bcc7183065dc568b9c346074de705eb274b9682c1a1a5eede85eb057
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs and a document body that suggests a lure for a general knowledge test. The primary embedded URL, 'https://ttraff.club/pify?keyword=test+de+cultura+general+peru+pdf', is flagged as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's intent is to redirect users to malicious content. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/pify?keyword=test+de+cultura+general+peru+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f88ce49752ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f9057da88e8b.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/mofep.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/ripebupevazuzebexivo.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3029889.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/8d959c.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/6236028b94.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://fukobararusi.weebly.com/uploads/1/3/4/4/134404541/zajegekofe_rikozozafutadex.pdfIn PDF document text
    • https://wulonuvesiga.weebly.com/uploads/1/3/4/3/134362584/rarusivapogukiv_nenekaliw_jemore.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/candidase_de_repetio_tratamento.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/functional_social_skills_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/35784272684.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/9250176706.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/what_is_validity_and_reliability_in_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad7b904-ea15-4462-aff7-9533031275cd/trials_of_apollo_dark_prophecy_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f39c245-9e35-4bb7-8848-bbcb3a806161/razinilisakalaxurajepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc535f7-26d7-4230-962d-9631ee375b65/ravale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c593b9-616f-4cf5-8c25-bba1837d7da7/daditukudewor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a33b28f0-5e34-4720-a7f2-c2e997929f1e/zexabif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11356aa-1708-49b3-a0b8-3d6ea0530609/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/930c3bbf-ec15-42c1-abaa-f2f71c713b3d/zanobabuzevola.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a2c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA2C3 18324 bytes
SHA-256: 706f7d95a7ff5df6dd891d1600774132ba0f55a8ff320c3c1ab176009dd11d8d
font_00_sfnt_off00006d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D46 4996 bytes
SHA-256: 6bdf7dacc796ba4f602fc73d00355592d003837b8fc67722f2331454c0c9def5
font_01_sfnt_off00007e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 11144 bytes
SHA-256: adcd1c427f48d71b3e86ded77fc17d850b191d4c4c850aafba02f0367148e0e6
font_03_sfnt_off0000bf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF67 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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