Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b4eb36dbb2bb4e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-24 14:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a8330d234b656329f79f175b60b0381 SHA-1: 102a9dd3b0feaf47b6e5edfdcf65af65ccf1050b SHA-256: 09b4eb36dbb2bb4e5e7149586b292d30933185c0e77235e4fdbf28903a13442c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body itself is heavily obfuscated but contains the same redirector URL. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=assamese+album++hd In PDF document text
    • http://files.csmmttaiwin.com/uploads/1/3/0/8/130813526/wiwaxizudamasor_tafep_kigumoju.pdfIn PDF document text
    • http://dodokozu.frogspecialties.com/uploads/1/3/2/8/132816202/vikuxusitosusozal.pdfIn PDF document text
    • http://detojol.lcpcpc.net/uploads/1/3/1/6/131636665/7991101.pdfIn PDF document text
    • http://files.skywartooth.com/uploads/1/3/1/8/131872087/kakilumo.pdfIn PDF document text
    • http://gofegeda.grottonsinchile.org/uploads/1/3/0/9/130969153/2791391.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/1/0432/0365/7887/files/kawasaki_bayou_220_repair_manual_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9114/0512/files/homeowner_release_of_liability_form_for_worker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/anexar_no_sei.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/gajodokanogegik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3898/9718/files/language_development_android_apps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1151/0170/files/diagnostico_cancer_de_esofago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9629/1994/files/bulletin_de_salaire_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/tevazesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/kadagulijojobagikov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/checksur._exe_tool.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 5

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_off00006982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6982 5096 bytes
SHA-256: 10841a87a01cbb0178c873474bed2a495fd7f63e750a4f45ff1f405a3a587f66
font_01_sfnt_off00007aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAD 10196 bytes
SHA-256: 17e2a32d09a8d2322626f80e727f479967a15922e9148fe8fceba539c6114314

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