Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b6ab013b9152ee…

MALICIOUS

PDF

38.6 KB Created: 2020-08-20 20:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee547a218033f0712344c58b3bdd5bde SHA-1: 6a81c1b0f1c48f5465b4484113ff3674bf600ff3 SHA-256: 28b6ab013b9152eed477284894b939afba95c15a1b2fed309630f774cf280f8e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=actuaries+unlimited+forms', which is also flagged as malicious. The presence of a large number of external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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=actuaries+unlimited+forms In PDF document text
    • http://files.alexoconnor-onlineportfolio.com/uploads/1/3/2/8/132814220/05530c216fa378.pdfIn PDF document text
    • http://files.bullheadacd.com/uploads/1/3/1/4/131483361/81403d.pdfIn PDF document text
    • http://pewep.showstoppersshowchoircamp.com/uploads/1/3/2/3/132303093/pigide.pdfIn PDF document text
    • http://files.autisticadults.com/uploads/1/3/1/6/131637043/sizonokemademu.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/1/0435/9100/8418/files/38656732856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3752/2082/files/himnos_cristianos_pentecostales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/quantum_numbers_practice_problems_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/80811131784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/xupajolavijefenovemev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/44705812790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/soundmax_integrated_digital_audio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73881495537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/25010998290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5951/0425/files/hp_laserjet_1536dnf_mfp.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 7

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_off00005802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5802 5156 bytes
SHA-256: 2717624c60480cc75ce571ee21c51b06788ccd531d054245f7ff5504f9fcb3fe
font_01_sfnt_off00006971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6971 10452 bytes
SHA-256: 8628cce81736ac61c83402dfe7136cfda9fa81978083e3ed2da237ee787dac71

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