Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bab4217388ae2a…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 22:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d4b320f5eae69c31bbec22e054e9600 SHA-1: 109d862580d15408496addbc1c6102e368ed4ce8 SHA-256: 37bab4217388ae2a8879be28b42190b5023fd96a58c35f46a51f4688ba900ade
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector service (ttraff.ru) known to host malicious content. The document body itself is largely garbled but contains the same redirector URL. This indicates a likely attempt to lure users to malicious sites through a link farm.

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=cheriyal+weather+report In PDF document text
    • http://dobugew.frankgomezjr.com/uploads/1/3/1/3/131379444/koger.pdfIn PDF document text
    • http://files.thesanctuaryatmn.com/uploads/1/3/1/8/131856184/d83262d07.pdfIn PDF document text
    • http://files.ecstantonhometown.org/uploads/1/3/1/6/131606268/malufi.pdfIn PDF document text
    • http://files.tcjewelrydesigns.com/uploads/1/3/1/4/131438776/detabawabixivoxezol.pdfIn PDF document text
    • http://sivavav.wisefooltheater.com/uploads/1/3/1/4/131407995/7894278.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/1/0439/7550/8126/files/nexov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/difference_between_circuit_switching_and_packet_switching.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/87523315230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/capturing_the_devil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/dovem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/bond_polarity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/evaluating_algebraic_expressions_worksheet_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8120/1819/files/42950593180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/75755126822.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_off000066a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A0 4828 bytes
SHA-256: 392d01036c95cfe1dfd8e375736ab137de65b7c968ce45f5a7f60314312dbef2
font_01_sfnt_off00007718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7718 13992 bytes
SHA-256: 8211ca62bcb824987db6e7152d16b90b940743c0119fe0a370f993bb2ce43c7b

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