Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca7f0db22f1d726…

MALICIOUS

PDF

48.0 KB Created: 2020-08-20 21:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a2b9afcbe50d252a74a10d341695dcad SHA-1: 12af3d8b05890924083b0a88eb206fbc16e0120f SHA-256: 3ca7f0db22f1d726d84a19aaf4b01b51f09604d5d4c6e49cae0f175b39f4c5ca
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, characteristic of a link farm, designed to obscure the ultimate destination. One of the primary links points to a known malicious redirector, ttraff.ru, which is configured with a keyword related to educational content. This suggests a lure to trick users into clicking the link, leading them to potentially malicious sites or downloads. No scripts were extracted, and the document body is heavily obfuscated, but the heuristic firings strongly indicate a malicious redirection scheme.

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=inverse+trig+functions+integration+worksheet+with+answers In PDF document text
    • http://vajab.nwutwincities.org/uploads/1/3/1/0/131070374/5029927.pdfIn PDF document text
    • http://kewaz.androtitle.com/uploads/1/3/2/6/132682974/gujikudu_kiziwolezog_godam.pdfIn PDF document text
    • http://zosavoz.stephgardner.com/uploads/1/3/0/8/130814328/2ada4d8bbee9.pdfIn PDF document text
    • http://xowuwu.jingyouecon.com/uploads/1/3/0/7/130740206/tujokuratedexu.pdfIn PDF document text
    • http://files.harperfolsom.com/uploads/1/3/1/4/131438177/d22b2cf730201b8.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/1/0430/5672/6170/files/weludulifazurewofotizumap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/rogakaxejotef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/k._c._s._e_timetable_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/36813859262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/66920256595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/zafozevexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/xakiwosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/talib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/mukufopavenewilab.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 8

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_off00006b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B61 5264 bytes
SHA-256: 76bd95464c263f1bd2d6b3795efdfd91941d976dedfb6471b7f868ede9e2d073
font_01_sfnt_off00007d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5D 16368 bytes
SHA-256: c227aef68e896eb7a789975ff2dd9e372ef22c772ffbdcd9ac3a33c88b0113f3

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