Malicious PDF — malware analysis report

Static analysis result for SHA-256 51aa3271120b2bb3…

MALICIOUS

PDF

51.7 KB Created: 2020-08-07 17:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cbf412e77ac4e124410aeaf6b76c13b1 SHA-1: 78d957eda6b9eabb8e32a95197b37cc86f354168 SHA-256: 51aa3271120b2bb31aade9cd9f2f539095b6c3c0732385872b5ab7f94b13b130
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to shopify.com domains, which is indicative of a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body itself contains obfuscated text and URLs, further supporting the malicious intent. No scripts were extracted from this sample.

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.cc/pify?keyword=boska+komedia+opracowanie+pdf In PDF document text
    • http://files.prosenation.org/uploads/1/3/0/7/130776478/dogagexizekis_lipokiwasexaw_lafosizej_vasodarafux.pdfIn PDF document text
    • http://files.korahcvs.com/uploads/1/3/0/8/130813528/tapuwokopokumewen.pdfIn PDF document text
    • http://files.fbcapeville.org/uploads/1/3/1/6/131606343/6293699.pdfIn PDF document text
    • http://files.blackdogfabrication.com/uploads/1/3/1/3/131379312/658e5bcc5d81.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/1/0432/7607/5164/files/bet_angel_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/vewulaleboxonelapoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4057/5386/files/bhagat_singh_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7680/files/70285212811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/fekefazumosiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/99730371602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/jovabivovipaxonivutazedul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/45725707709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6883/1382/files/bailes_tipicos_de_nicaragua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/ralurabexoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9744/7831/files/zofalumituviderofa.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_off00008cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD1 5476 bytes
SHA-256: 59b14e4b435289826c17e05dd261ca68a312b2c9f32a390e45537e95163f7a58
font_01_sfnt_off00009f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F76 10268 bytes
SHA-256: d91e41f24fdba846cbdd91034886db376e4e7536378a43f00848eb40152077eb

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