Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6368c9e289f7a6…

MALICIOUS

PDF

42.8 KB Created: 2020-10-02 15:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c0ade00646ec8b179b96496593e9dbed SHA-1: 3a26865434d87446ec797d3dc353e2e7733c8667 SHA-256: 8e6368c9e289f7a62c9fe20fede26e04101e697ffc7db39befeb9310f31b50cb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to generate traffic or distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/pify?keyword=pvc+archery+target+stand+plans In PDF document text
    • http://files.tcspringtraining.com/uploads/1/3/0/7/130740596/zevajisek.pdfIn PDF document text
    • http://wuroxe.adventurerefined.com/uploads/1/3/1/4/131452938/duzuwuserolakula.pdfIn PDF document text
    • http://files.angelafree.org/uploads/1/3/0/9/130969896/e248c8cab.pdfIn PDF document text
    • http://files.lorahakanson.com/uploads/1/3/1/3/131379149/ratizinuwofowun_bawojarasutezo_tikomudu_fuperizotunamaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2834/0123/files/57268607881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2182/0058/files/primary_and_secondary_respiratory_muscles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/78007067585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8991/1715/files/sodaputusexiwave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8972/6107/files/fallout_new_vegas_casino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6725/2641/files/gpskevin_trans_america_trail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1652/7265/files/96807157944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7517/5335/files/ship_a_car_direct_auto_transport_reviews.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9D 5496 bytes
SHA-256: 8e5cd435dbb41a02f32cbf2d1c05f7ff0541782d7f6088df3adb9107c34670d0
font_01_sfnt_off00007d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5D 9620 bytes
SHA-256: 45dc142f4fdff8b92a46d989cd6543f5d04016e070e44f4d5a89a7fd1081ab40

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