Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd21c690c372c2a…

MALICIOUS

PDF

46.9 KB Created: 2020-08-18 16:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a911991e4589ac5e235fc8a9a0cf3d58 SHA-1: e42c6fdc6e320bf27432ba4194e634291dc304cc SHA-256: cbd21c690c372c2aaff9ed6724ebb41512c24fa511ddf828945603628bad22a8
194 Risk Score

Malware Insights

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

This PDF file contains a mass of external links, with one specifically identified as a malicious redirector to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, indicating the primary intent is to lure the user to this malicious site. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to increase the visibility of the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=characteristics+of+computer+generations+pdf In PDF document text
    • http://files.hpcpet.com/uploads/1/3/1/8/131858044/8828378.pdfIn PDF document text
    • http://ravus.seendparishplan.org/uploads/1/3/1/4/131453060/a17120a3013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0622/0697/files/historical_geology_lab_manual_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/82483011388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/58703975770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/ponefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/lodegusikixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/41599275451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/53830714577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/65409189012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/adobe_indesign_cs6_full_crack_sinhvienit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/guwinedegasavox.pdfIn PDF document text
    • https://www.cancer.gov/coronavirusIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 5440 bytes
SHA-256: 2517124b9a4b95b94c88a7dec152862ece6e764a470a53f151db4a72b33d30d6
font_01_sfnt_off00007c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C13 10808 bytes
SHA-256: 5ca5f62928e4d06fa8f8e81f6c06abb5e8bfdfd9a1b9abacac74d776525e7626
font_02_sfnt_off0000a0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0C1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.