Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9cab81689c1a39…

MALICIOUS

PDF

39.8 KB Created: 2020-08-13 23:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 816ffeeb160c95dc58e807bdb1179fd6 SHA-1: 7e18d4d4e8ca8dd9729f8eea8fabae996301b463 SHA-256: 3d9cab81689c1a39b14127cde2a2fa44803d5d6b6f87c6a9bdeff997c63ff59e
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=gphc+fitness+to+practice+report'. The document body, though obfuscated, contains text related to a 'Gphc fitness to practice report' and includes numerous embedded URLs, many hosted on shopify.com, suggesting a link farm or redirection strategy. The primary malicious URL is the most critical IOC.

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=gphc+fitness+to+practice+report In PDF document text
    • http://files.coachskeen.org/uploads/1/3/0/7/130776518/lenepopimobi-binetetak-finukuw.pdfIn PDF document text
    • http://files.waywardweaves.co.uk/uploads/1/3/0/9/130969160/4d80d2f9ff9.pdfIn PDF document text
    • http://files.ohioyarn.com/uploads/1/3/2/6/132681938/dofexeduwo.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/1/0453/8662/9288/files/appareil_gnital_fminin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/19413398283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2950/2874/files/31632451097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6143/files/classical_mechanics_taylor_2005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/14213331650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/76785495461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5104/1447/files/kebelukokezugukefogasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/beamng_drive_demo.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_off00005ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD1 5100 bytes
SHA-256: 6460881a95fc8aa1356a883f6490d000b4af67e748be7b3033d723022fdcabdd
font_01_sfnt_off00006c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C26 12036 bytes
SHA-256: 2a6a5ce7512273da0a31b39f16b5538c3e22061542b5e3ab7212eac82fd05ef6

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