Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba8b0274a6f36da…

MALICIOUS

PDF

36.0 KB Created: 2020-10-29 10:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6a417cf161e6ed9f4ff2a085a41a6a1c SHA-1: 12e462876ba5c815b59f66b4fc65d89eb4afe7ea SHA-256: 1ba8b0274a6f36dabb8df2789a05152f04bafc1060ac981e4c077df66ea69064
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely to facilitate SEO spam or distribute further malicious content. The document body itself contains garbled text but also includes the malicious URL, reinforcing the redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.ru/pify?keyword=united+artists+la+canada+california In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f90c28bdf895.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/7341459.pdfIn PDF document text
    • https://julapaxukej.weebly.com/uploads/1/3/4/4/134492969/jomalelamumefa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03fcff6c-ce3c-4a8c-a37d-02d58f266bdd/bexogiguserigux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb1ac03-07ab-4da5-b97d-eb84416246cd/menejozomexeladob.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/44410580547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3735/files/51960843066.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/kajarusixekolanijanitire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336d2c80-5637-4a00-b9ea-88f46bfe3ec9/78580711255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3339c977-9419-458b-ba28-fe37261e58f1/dunosemaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e626e0-5900-44d0-b2f5-1f1326d92407/67326986190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4038742a-a79a-4d80-81ce-7f0e17260c36/mario_kart_7_3ds_rom_romsmania.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6250/4855/files/1406951446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1727/9911/files/android_lollipop_5.1_software_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/radical_equations_worksheet_algebra_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/29692615789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4240c2-5b04-4231-9d46-e940f96ad2b1/81223454915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f807de-5e26-48ac-b930-9364573d162a/20089531497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5597/1996/files/84801114777.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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000487b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x487B 5004 bytes
SHA-256: fccaa1a4fd04dee5b3861bb9af4e9d546de543fc59370bc2bc4312313d2676df
font_01_sfnt_off0000598e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x598E 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off000064ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EF 8728 bytes
SHA-256: 08352ea818a92960e693fc94de602efe34db962de23b71c58d0a15f9d84a6a65

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