Malicious PDF — malware analysis report

Static analysis result for SHA-256 39dc7dc83386f1b7…

MALICIOUS

PDF

47.6 KB Created: 2020-08-02 09:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4021a67b2d48d389099934f9284ecb64 SHA-1: 72fdb01b812723c10d97739881f42ade350f44de SHA-256: 39dc7dc83386f1b741b1b51f2c6e569736ac98559029ba1bb65adca753c4f802
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, indicating a link farm or SEO poisoning attempt. One critical heuristic firing identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=aphorism+literary+definition'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a lure to download further content or visit malicious sites. 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=aphorism+literary+definition In PDF document text
    • http://files.joningephoto.com/uploads/1/3/2/8/132815054/kagekivupes-finew-wonunevumijex-tuxuka.pdfIn PDF document text
    • http://files.zportman.com/uploads/1/3/0/8/130874627/nejajedozufejanoxifi.pdfIn PDF document text
    • http://files.hopsbrewbeer.com/uploads/1/3/2/6/132695301/7276788.pdfIn PDF document text
    • http://files.ucfilter.com/uploads/1/3/1/6/131606901/zexowelela_xepadibuzemujuk_zavuf.pdfIn PDF document text
    • http://files.embodiedrelationshiptherapy.com/uploads/1/3/1/4/131483281/023158.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/1/0429/0415/8364/files/python_list_slicing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/12158465248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/dujalugalitojoxugatawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/21419037984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/33254804398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/68125024331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/23515215170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1440/6823/files/5405728709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/pokuzozevudimawaxeriw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/tixosodasomivafoposu.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_off0000784a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x784A 5372 bytes
SHA-256: e9716254fc6ff0ac6b6acc5ea883b674e09d9d5991bf939095c46d05fd8e739c
font_01_sfnt_off00008a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6C 11492 bytes
SHA-256: de391a2b6a5a67d5b8385a4e82e57bc1966299dde3bf89c797f8daab812de776

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