Malicious PDF — malware analysis report

Static analysis result for SHA-256 6598a83e9d135d47…

MALICIOUS

PDF

44.0 KB Created: 2020-08-17 04:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3bea5479e91af4188a7e6e175b693929 SHA-1: d560adce60f336785c1d12ba60a2e988766395af SHA-256: 6598a83e9d135d47ae005cc7f969a2267e2d023b8495fa0ec934a84c943acf88
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service at 'ttraff.ru' which is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for free worksheets. The presence of many external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=drawing+line+graph+free+worksheets In PDF document text
    • http://mirijerir.sportsapparel4u.com/uploads/1/3/1/0/131070374/7767414.pdfIn PDF document text
    • http://files.michaelbrownslawoffice.com/uploads/1/3/1/4/131406762/xajixolaxexojobegu.pdfIn PDF document text
    • http://vijojov.singerfedun.com/uploads/1/3/1/3/131379510/2a41d1d3dbbf54.pdfIn PDF document text
    • http://nikaro.trivalleysir34.org/uploads/1/3/1/6/131606490/2007735.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/1/0434/4155/3575/files/38409364336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/65733584835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6219/0489/files/62488493239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/ink_sac_pixelmon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/17052806132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/nogutefibuxeranuzalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/33659653395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3779/4204/files/wifi_signal_booster_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/akon_lonely_lyrics_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/piguxifuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.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_off00006d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D62 5320 bytes
SHA-256: 8e04d1a6c8b9e178314b050e4bc8c3208cc79fa4f474ce132be647663fb86331
font_01_sfnt_off00007f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8A 10456 bytes
SHA-256: 9ace3a57e3e1e8d05ae48c4c4fd2d2a31f1c115f839b98560d6b929eda1e7527

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