Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11c2f3ae2885b5e…

MALICIOUS

PDF

34.7 KB Created: 2020-08-20 03:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: befc96403df7193366dcd728ed216d97 SHA-1: 7d361f29584af600aa365ca9d936695b6e7d24dd SHA-256: b11c2f3ae2885b5effd377d77fcb49765cfb25781c8ce21e549b26f4cd1cee96
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

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=lake+shore+drive+sheet+music+free In PDF document text
    • http://files.blackorbnovel.com/uploads/1/3/0/7/130738889/xasafibilufax_xekamadimobi_gimiganigo.pdfIn PDF document text
    • http://files.bryanallankrauss.com/uploads/1/3/1/8/131872238/1960051.pdfIn PDF document text
    • http://lomegepid.sustainableswansea.net/uploads/1/3/0/8/130814328/sijarena-pisabu.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/1/0431/0643/5232/files/fumuvumisiganuzozofew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7991/files/quick_memo_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3446/7752/files/cayley_hamilton_theorem_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/90234172624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/manual_de_frases_basicas_en_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9764/4444/files/buzofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0068/2906/files/d_d_druid_guide_3._5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/10337568959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/bogubirapirefulomokepavoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/leave_and_license_agreement_format_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/80411831513.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 1

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_off000048ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48EC 5296 bytes
SHA-256: a1b9e45267066fa865e219bcbb45ec00d55a37c2955d8209097821baa50643f7
font_01_sfnt_off00005ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD6 10300 bytes
SHA-256: ea97404efc83bbb193203e3a90daab84c49f149fac16ba12677ba7daf048809b

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