Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39441423b5fb8b5…

MALICIOUS

PDF

61.9 KB Created: 2020-08-10 17:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e74895549cb439248b12454b134d46fc SHA-1: 0334c95d60452bce3017647b073e488035122795 SHA-256: b39441423b5fb8b5d0c2f408d76b8bb8aa403972358e8e3903a19e8328566c48
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a link farm heuristic further indicates a malicious intent to distribute links. No scripts were extracted, but the overall structure and link analysis strongly suggest a phishing or malware delivery attempt.

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=handbook+of+the+cerebellum+and+cerebellar+disorders+pdf In PDF document text
    • http://files.actionpooltour.com/uploads/1/3/0/8/130874520/4203753.pdfIn PDF document text
    • http://bibeben.mrwegnerinroom92.com/uploads/1/3/0/9/130969656/meragubero_bodejinemorire.pdfIn PDF document text
    • http://files.cpang-architects.com/uploads/1/3/0/9/130968926/sirakolul-ximova-buguselo-mubapawabebej.pdfIn PDF document text
    • http://sazujum.juliehui.co/uploads/1/3/2/3/132302780/2914e481134cd0c.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/1/0431/1210/4103/files/buzanikofepop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3649/2444/files/88158971559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/52254657241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/58610197094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8202/3073/files/mr_coffee_keurig_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/3916766931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/nuvolebana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/logutoxisotimadula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/statistical_treatment_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/kixeletifisulalawipagep.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 6

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_off0000a769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA769 5560 bytes
SHA-256: cc4527868670b692463e0b1be7f2d5aa67ab43d13f8612cd4289019611318923
font_01_sfnt_off0000ba1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1E 15720 bytes
SHA-256: 9e18723a827ade3a1cd0438c949f3749d032ded487a35893bfca4967d1be4ad7

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