Malicious PDF — malware analysis report

Static analysis result for SHA-256 a773b424c20ab21c…

MALICIOUS

PDF

35.5 KB Created: 2020-07-15 19:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ff27a97f6be62eb84ae567ff1f2bdd7 SHA-1: dd82f9d6cf85ea749946c10a2706bacf6795d9cc SHA-256: a773b424c20ab21c1a8ddd24a12113ec3ece5ada95d3d53980d725ea148236f4
192 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary heuristic identifying a malicious redirector. The document body is heavily obfuscated, but the presence of the URL 'https://ttraff.ru/wb?keyword=verb%20to%20be%20test%20pdf' strongly suggests a malicious redirection attempt. The file also exhibits characteristics of an SEO link farm, indicating a potential attempt to manipulate search engine results or distribute malicious content through a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • 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.
  • 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/wb?keyword=verb%20to%20be%20test%20pdf In PDF document text
    • http://files.pmuelling.com/uploads/1/3/0/7/130775520/9638114.pdfIn PDF document text
    • http://files.hamiltonproperties.net/uploads/1/3/1/3/131398220/wugosusobevuvokaf.pdfIn PDF document text
    • http://files.techniquejobs.com/uploads/1/3/2/7/132710624/3138880.pdfIn PDF document text
    • http://files.aucklandpolo.com/uploads/1/3/1/3/131382032/ziseweseboduloso.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/1/0429/6350/1222/files/48676154512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/kijanovobajerinelaxeruraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/zopixoritanupumesexejozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/noborogok.pdfIn PDF document text
    • https://nifubija.files.wordpress.com/2020/07/mexagirupudipifa.pdfIn PDF document text
    • https://weteritisomu.files.wordpress.com/2020/06/55233974912.pdfIn PDF document text
    • https://genirun.files.wordpress.com/2020/07/13500278919.pdfIn PDF document text
    • https://wafosagejam.files.wordpress.com/2020/07/zekanavademorerag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/genumodijisetewepikezod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/47656028537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/42398242861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60233972239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7291/2549/files/pifobapokobudapena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/lowusuxazisububabamebotoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/tegesozaxedonugafanunep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2725/0850/files/duzezejumasop.pdfIn 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_off00005f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 4532 bytes
SHA-256: db56683ed064cfa33588a6322fda9638afc046a001ef7e4ea9a21bef5d9b2139
font_01_sfnt_off00006e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E84 9524 bytes
SHA-256: 80ecea655251b3e509efda605ab3416455eb79b80151b784fb0c6fa7a51c0ccc

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