Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b31c331d91da7f…

MALICIOUS

PDF

36.5 KB Created: 2020-08-23 13:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40420e215b54aaca67b65fdb5ca09ba0 SHA-1: 744be226cb7a8bb5b61105d651336077db9ec858 SHA-256: 72b31c331d91da7f9e4ce89f8792dca14210bfe93d39efb713e4d269643e2cdb
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body and heuristics indicate a lure for a game download, likely a phishing or malware distribution attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest an attempt to generate traffic and potentially distribute further payloads.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.cc/pify?keyword=assassin%2527+s+creed+bloodlines+psp+game+free In PDF document text
    • http://tolomike.cmsa-tn.org/uploads/1/3/1/0/131069860/namadebo.pdfIn PDF document text
    • http://files.jagnq.com/uploads/1/3/0/9/130968988/gorilizilapavi_nazegofufebepuz.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/1/0434/3247/6838/files/essential_math_for_data_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6935/8758/files/96232230342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/11886577375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/0261/1100/files/71081182891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6012/6118/files/67805634994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/nogagulorawoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/dash_button_setup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/how_to_invite_someone_to_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/24586247381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/zixoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/50_tons_de_cinza_gratis.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F76 5640 bytes
SHA-256: 987106f5454d8e34113472d6dfe09ae84fe7f124941e696b183287693423f4a1
font_01_sfnt_off00006286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 10128 bytes
SHA-256: cc39e4c4cdfd17ce95162f766d4b9049dd55a03c57f6938899bac9fc17e9d954

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