Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b6f008478e0683…

MALICIOUS

PDF

45.8 KB Created: 2020-07-30 14:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eddd603d93cc866fa4b20ed835ecf6cc SHA-1: cfb48074373426b681524a71d4ee506920dd2275 SHA-256: 77b6f008478e06837948775915bfab7e8d565ce32e1a4843fbec05a76a136d0d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) disguised as an aptitude test. The ML classifier strongly indicates maliciousness, and the presence of many external links suggests a link farm or phishing attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links within the document.

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=aptitude+test+formulas+pdf In PDF document text
    • http://files.whites-butchers.com/uploads/1/3/0/7/130775413/fujimopozut_xixonisalazokix_xifuxesilivo_wubexok.pdfIn PDF document text
    • http://files.rebeccagraceandrews.com/uploads/1/3/1/8/131871535/tezogi.pdfIn PDF document text
    • http://files.fetrowphoto.com/uploads/1/3/0/8/130873795/tigevajadowirifon.pdfIn PDF document text
    • http://files.aplusdecoratingservices.com/uploads/1/3/1/0/131070051/f1a141.pdfIn PDF document text
    • http://files.serafinureno.com/uploads/1/3/0/8/130814205/javefafigonok.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/1/0432/6939/0500/files/42461363763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/95227401388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6953/files/81633409358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/77311637323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9558/8002/files/70228682579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/didebufexogiresaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/zivazovivutixizojixutol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/giguvunixej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7920/5018/files/bipimikoduninafozagabonav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/nejojezidojakijibenas.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 5

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_off00006e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E11 4952 bytes
SHA-256: 3b77ba39a4e3209b42d3514d5196f1315c0c8794694432c63a68ad32d8c3cff3
font_01_sfnt_off00007ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE8 14028 bytes
SHA-256: e3de73178f8c9b9450d775099875df32e43a32d0f0d0a12a3e68f0d4b3f0a231

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