Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd110afb6df96d2d…

MALICIOUS

PDF

54.8 KB Created: 2020-08-19 08:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c6e3e48c40079140100d2ce10e94f543 SHA-1: ed6bfcbffcb5b937353ca0f342de122aee27d377 SHA-256: bd110afb6df96d2d4d00b2abe939a9339ec626f09f9c048635ebb99f05f4fb0f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links to external PDF files, many hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=drug+excipient+compatibility+study+guidelines', points to a known malicious redirector. The document body itself is heavily obfuscated but appears to contain the same URL. The primary attack pattern involves luring users to malicious infrastructure through a link farm.

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.ru/pify?keyword=drug+excipient+compatibility+study+guidelines In PDF document text
    • http://dirimita.nationalroadchurchofchrist.org/uploads/1/3/0/9/130969329/b3b37c6b7e6acb.pdfIn PDF document text
    • http://files.26anderbycreek.com/uploads/1/3/1/4/131483098/7724809.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/1/0436/9183/5547/files/96560707158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9978/2309/files/53064336921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/wotupereduwekon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/16380285900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/16430137246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/bond_energy_calculation_chemguide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9376/1956/files/rendering_in_pen_and_ink.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/sezajugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2321/6290/files/xukeminilonozuxasofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/livros_sobre_alimentao_saudavel.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 3

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_off00009733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9733 5704 bytes
SHA-256: 5a8d2b3cf708004c34d2a7cfe6759f14774b5d65e7cc031c3cf04602fc463da5
font_01_sfnt_off0000aa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA8E 10328 bytes
SHA-256: 7caf22d065801a2b37e337d04acdbcc1d452e455b386f9dced1fdb003f2dae01

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