Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a3c31eadb1959f…

MALICIOUS

PDF

70.8 KB Created: 2020-12-03 22:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f0b7e84d81880eab2b150608f577943b SHA-1: 5968681275f122d09c809d2c7a0269cf22ba7b8b SHA-256: a5a3c31eadb1959fa2b55ee5041db3efab3aa73a4b021a1a64e0ef445858c5d6
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://traffking.ru/123?utm_term=miller+heiman+strategic+selling+ppt'. The document also exhibits characteristics of an SEO link farm, with numerous embedded links to PDF files, suggesting an attempt to distribute malicious content or phish for credentials. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=miller+heiman+strategic+selling+ppt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8b205b13fec.pdfIn PDF document text
    • https://xinotojopafexiz.weebly.com/uploads/1/3/4/3/134316842/9592541.pdfIn PDF document text
    • https://xapefawisago.weebly.com/uploads/1/3/4/7/134771693/0b44b290e63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483854/normal_5fbacde254fed.pdfIn PDF document text
    • https://rusopanuguxixat.weebly.com/uploads/1/3/4/6/134640346/7906924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_5fbc3301bc96a.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/17551408210.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/26480478195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_5fc2bbf22bf36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460076/normal_5fad832d8efc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5fa0226a35ba0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe02c818e72e5fdb9d756a/1606288073085/17359736241.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off0000c2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EF 5352 bytes
SHA-256: 9d4d5110f8ec1248613a73c888a2e8519a4622f8b687eed4ba898d8cf6c66c5f
font_01_sfnt_off0000d500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD500 10608 bytes
SHA-256: 757b342464e81dac34aa845e8d01bbd114309de45411764a092ee43d39a77342
font_02_sfnt_off0000f926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 16232 bytes
SHA-256: 0865ea5686e30d19842a941efae749c2e92da649021023aa876fc32c67f43dd0

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