Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7105f407585300…

MALICIOUS

PDF

36.3 KB Created: 2020-10-06 16:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 715ee0dfce4f29a6cee78b31366b9359 SHA-1: dfd9b1aea9ceb6d807402e82bf3f7ff2bca6bc76 SHA-256: 1a7105f407585300b695bbe4724a38673e8ff9d1991bda4ef74284ca2f307c2c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The ML classifier also strongly indicated maliciousness. The primary function appears to be directing users to potentially harmful external content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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://gettraff.ru/pify?keyword=yakima+space+booster+manual In PDF document text
    • https://site-1036975.mozfiles.com/files/1036975/82689734350.pdfIn PDF document text
    • https://site-1039933.mozfiles.com/files/1039933/tobivevuwepuxemovilotati.pdfIn PDF document text
    • https://site-1040374.mozfiles.com/files/1040374/96716078365.pdfIn PDF document text
    • http://zazawe.jeremysony.com/uploads/1/3/2/6/132696030/5262835.pdfIn PDF document text
    • http://wafem.fosterskennel.com/uploads/1/3/1/3/131380284/8036156.pdfIn PDF document text
    • http://files.microlotmusic.com/uploads/1/3/1/1/131164456/94df12.pdfIn PDF document text
    • http://ganekur.elasad.com/uploads/1/3/2/3/132303027/lowiwulavof_kasuz.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://cdn.shopify.com/s/files/1/0494/2410/5627/files/thundarr_the_barbarian_netflix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1889/0645/files/sibudapejewobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1628/0475/files/the_3d_printing_handbook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc22dd9-d621-4309-b18a-bdff9bc2a7a6/tipatodegaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/700a6338-d602-4456-940f-5c5ebd98759e/vasuropuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a43411e3-94e7-4baf-8753-ae450e80949f/12407572408.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4294 5128 bytes
SHA-256: 1ea9b906af52d9d0708fbd4cb4cf68e386fda32a787e8e2ae24d969f0d99887c
font_01_sfnt_off000053e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53E0 10176 bytes
SHA-256: 5425bb126ac649e58e8d14c25effc7783a2a7a17a09e5f032b6ba615070f4be8
font_02_sfnt_off0000766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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