Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d81d57f78aac379…

MALICIOUS

PDF

46.8 KB Created: 2020-08-05 10:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3345439e6ae97487bd59a0ffdc0bacb5 SHA-1: e7a291dc65fa7813387f595192c923bb2028d371 SHA-256: 6d81d57f78aac379bbda7f34d2818f1e7d06a74c8e25eb35565fee135121292c
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create an SEO farm, directing users to a redirector URL (https://ttraff.ru/pify?keyword=audio+visual+aids+pdf). This redirector likely leads to malicious content, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the phishing lure.

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=audio+visual+aids+pdf In PDF document text
    • http://sofup.debatebsme.com/uploads/1/3/1/6/131606349/moterigegelo.pdfIn PDF document text
    • http://files.achievewithaimee.com/uploads/1/3/1/6/131606127/fc69d.pdfIn PDF document text
    • http://files.perimeterdrainagevictoria.com/uploads/1/3/0/7/130740571/8078505.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/1/0437/4839/3112/files/practical_multivariate_analysis_fifth_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/voraxeburaxixovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13121593915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/92708240987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depusulolunifanilux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/gukawumunutonopep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6086/2882/files/rubibuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/rumupazurojidakamuwad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/ligobomugowudasekafafir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/49417562424.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 2

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_off00007b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B40 4988 bytes
SHA-256: 955fa6676283ad146d84decbf102bdf183f9d167a1ef8ebe3205d24c328578f3
font_01_sfnt_off00008c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C56 9996 bytes
SHA-256: e66c80f1f8dac0f13efce7c478570b7f37eb9e1fbb857ed52e2907f933143e7e

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