Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca80d206375d2b3a…

MALICIOUS

PDF

33.3 KB Created: 2020-08-20 06:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 13d3897d97461c1cb01f2ba357b1b12e SHA-1: 88daa8c40e960a79a6df89d144c03b6f4e3a7153 SHA-256: ca80d206375d2b3af791bed674979508fb7734babaf4fdf709dbcaf1991bcdde
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) which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a 'free download' lure, specifically 'goodbye lenin sheet music free'. This indicates a phishing or scam attempt, likely using the embedded links to deliver a secondary payload. The ML classifier strongly supports the malicious verdict.

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=goodbye+lenin+sheet+music+free In PDF document text
    • http://pebule.championcleaning.net/uploads/1/3/1/3/131382134/8272b4cb409.pdfIn PDF document text
    • http://buxoriluv.camaschurch.net/uploads/1/3/1/4/131437619/sitej.pdfIn PDF document text
    • http://files.shamrockbusinesscentre.com/uploads/1/3/1/1/131164538/8052118.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/1/0432/3062/5950/files/boys_like_girls_thunder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/alistar_support_build.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/2386823309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/wofumalitodutalas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/traditional_approaches_to_the_study_of_political_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/alif_episode_10_by_umera_ahmed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1815/7221/files/kajonikudovut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/54783050031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.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_off000045d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45D0 5324 bytes
SHA-256: a5826e078570250a38e3308085b2c39239fded5352c59b1f5dbf2b4df3b19fb6
font_01_sfnt_off000057cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CC 9656 bytes
SHA-256: aa33933b5ee617e8d84c262c92583251d6f87edf8b8a63609b74f55545ed5ae5

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