Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f5ada13afbd749…

MALICIOUS

PDF

72.5 KB Created: 2020-08-14 23:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00c1b29c1f2d7a3d76f5f0397545dfd5 SHA-1: 969d891efa84348445120d533349f4192ab151a1 SHA-256: 77f5ada13afbd749a94f62f3bb196cd1acf1541779357ed495dfa349d57c6304
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body and heuristics indicate a lure for free downloads, likely a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/wb?keyword=terjemah%20syarah%20hadits%20arbain%20pdf In PDF document text
    • http://files.experienceenso.com/uploads/1/3/1/3/131380894/muputugonavig.pdfIn PDF document text
    • http://files.cobilconnect.com/uploads/1/3/0/9/130969853/6ea8d66a.pdfIn PDF document text
    • http://mizotipu.oakcreekestados.com/uploads/1/3/1/6/131637881/kofuvaputepovumodax.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/1/0433/6022/3382/files/wella_koleston_color_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/54164940868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/84201165284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/cardiomiopatia_hipertrofica_felina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/51809612433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/96925983315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/ca_medular_de_tiroides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/mubixunexevinute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2684/9697/files/bobafixorosulobanefer.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000db81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDB81 31172 bytes
SHA-256: 9b7ab08712a7415b1f012c8c50500b35fbc85979c8cc596c66d2bcb3e8e95572
font_00_sfnt_off0000a5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AF 5516 bytes
SHA-256: b9a74c4d6831d19e4111b087c82dee755d59c6ffdaafb32aac835afa871a3349
font_01_sfnt_off0000b851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB851 10216 bytes
SHA-256: 386154652e90364808f6818ba4e975853bf97eac1233320529d20ec5ea2bdba2

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