Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69122a9122c1587…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 12:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f57450b902aeb6ea05e957001439333a SHA-1: 328c63ca07732e66008f0cd1964d134d47596610 SHA-256: a69122a9122c1587a4d951ac9e38773717deb90b82894fe253afc572b0b679f4
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=antonyms+3rd+grade+worksheet+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a worksheet, likely a lure. The presence of numerous other Shopify links, some confirmed benign and others unknown, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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=antonyms+3rd+grade+worksheet+pdf In PDF document text
    • http://files.area51scooterclub.com/uploads/1/3/0/7/130740458/japezarurizojadonozu.pdfIn PDF document text
    • http://risulegel.cocrimeanalysis.org/uploads/1/3/2/3/132303035/tusuvifubokilesipi.pdfIn PDF document text
    • http://files.michigancourses.com/uploads/1/3/0/8/130814466/1771020.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/1/0432/0237/9939/files/36759461393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/bobrick_b_2111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4283/8427/files/whirlpool_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/rogefugoniguwojapasepikop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7587/0613/files/tulumumaduzexogofepib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/nuwizatura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/dutimatojaparazetup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/jusekikase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/jofataradasusin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/75519928920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/20189204450.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 4

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_off00006388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6388 5832 bytes
SHA-256: 59a7dbfeea75e0fc571dec16f5a211978c920047ed3e11ddf2d02115ff5e6de4
font_01_sfnt_off00007757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 10596 bytes
SHA-256: ee69b81386ef8534494b0c8fd7e98196ff7f1b3fea4a9dab4735511ad7642516

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