Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e920923504331b…

MALICIOUS

PDF

44.9 KB Created: 2020-08-11 18:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ebc2e04b638ae384be358b69afdf2df4 SHA-1: a9cadb5761c7c2bec95e6e4472853ee0122f56a9 SHA-256: e3e920923504331bce40d8df24409b7daa2dfebdb52ea879c63bafb26814884d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, https://ttraff.ru/pify?keyword=polymerisation+of+alkenes+pdf, which is the primary indicator of malicious intent. The document body itself is heavily obfuscated and contains a mix of seemingly random characters and embedded URLs, further supporting the malicious redirection 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.ru/pify?keyword=polymerisation+of+alkenes+pdf In PDF document text
    • http://files.enrichnaturals.com/uploads/1/3/2/6/132695915/gubedivovafakeka.pdfIn PDF document text
    • http://files.shoplashmayhem.com/uploads/1/3/1/6/131606059/kaniremulidom.pdfIn PDF document text
    • http://files.landtoseasurvival.co.uk/uploads/1/3/1/1/131163872/1234414.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/1/0432/2259/7800/files/55228820040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/gupomixosoduzeman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/31923420786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/48400205619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7862/2111/files/cancer_de_colo_do_tero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/zutetukapope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/florida_surfing_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/24790392903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/rugok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/wazefoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/8408106339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8378/4601/files/79523649644.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 7

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_off000071af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AF 5356 bytes
SHA-256: ab0a57bc2a694f379203143c24ff315fa3402bc993ee3776db5027c156e30989
font_01_sfnt_off000083cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CD 10260 bytes
SHA-256: e4e90de00cdff56d9f0904d3e2999ce202b7c6b1485e7ead518b12e655882fe2

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