Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e78b034b9997113…

MALICIOUS

PDF

40.9 KB Created: 2020-08-11 19:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d819c7a23bd027bbea8a76460b2f146 SHA-1: b4a3d080f58dc39a368feef01d67a311d954881b SHA-256: 4e78b034b9997113ab0c5158b9a3aa4279a8d17fd115920aeee636924695bb37
194 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to a critical heuristic firing for a PDF redirector link. It contains a mass of external PDF links, with the primary malicious link pointing to `https://ttraff.ru/wb?keyword=the%20ultimate%20chess%20puzzle%20book%20pdf`. This suggests a phishing or scam attempt leveraging a link farm to distribute malicious content.

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/wb?keyword=the%20ultimate%20chess%20puzzle%20book%20pdf In PDF document text
    • http://files.romanstravelwithcare.com/uploads/1/3/1/4/131453005/bajubakugu.pdfIn PDF document text
    • http://xujexiso.qcfamilymartialarts.com/uploads/1/3/0/8/130813054/78267ab9c.pdfIn PDF document text
    • http://files.pegasusmodelclub.com/uploads/1/3/0/7/130775014/5563903.pdfIn PDF document text
    • http://files.publichealthmuseum.org/uploads/1/3/1/0/131070851/wunamotuleze.pdfIn PDF document text
    • http://files.itshoursunlimited.com/uploads/1/3/2/6/132695352/wesomolofibed-lirifa-sukowuxamodo-regetefiseza.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/1/0431/0712/3357/files/43826249764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/zuduwipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/72830587986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/how_to_delete_messages_on_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7441/0910/files/29391150289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/82216709552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/restore_disk_image_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/venorisexeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8268/6370/files/69617338384.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_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 5504 bytes
SHA-256: 121cc9eac0991bce1a9f80a8de4d057dfb5e2216caeb6da72676a53b00ae5221
font_01_sfnt_off0000742b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742B 10088 bytes
SHA-256: 89b3b21c0a49bdc769df987ad907f33dd9a2dd639f3884506a579ab4667babbe

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