Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ce90e7fb82649b…

MALICIOUS

PDF

43.7 KB Created: 2020-07-29 19:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 660540c31fcb97373ba520b843bea49f SHA-1: 79ff673893f38b67175d9cee6be2c809015a884d SHA-256: 85ce90e7fb82649b40d45241065bebfa19e6169d01c1483fc7928e25e08886e2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to SEO-optimized redirectors, including a primary malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, suggests a lure related to PDF conversion tools. The ML classifier strongly indicates maliciousness, and the presence of multiple external links points towards a link farm or phishing campaign.

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=converter%20pdf%20em%20word%20online%20gr%C3%A1tis In PDF document text
    • http://files.premierpoolsga.com/uploads/1/3/0/7/130739646/xinikijopi_segeme_jubidi_jalirigatawele.pdfIn PDF document text
    • http://files.twolabyrinths.space/uploads/1/3/0/7/130739713/54aaa74b294c.pdfIn PDF document text
    • http://files.judimorningstar.com/uploads/1/3/1/8/131856333/tojedulipuba.pdfIn PDF document text
    • http://files.jackienorman.com/uploads/1/3/1/8/131860787/xewaguxevaxo_xarak.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/1/0428/9835/8432/files/zekimopesafirizaxos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/kezupafebugojogokaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/monov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/55768403103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/48741054562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0876/0735/files/32969545009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/77221448454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/tameporufasevibexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/560201430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8619/2546/files/dederologolizorudipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/xejimenisikori.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_off00005eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB5 5348 bytes
SHA-256: 87159473af435f0c2795bf15b9b8e36ae9ab0e0574e3fa2c16075d9c786842ed
font_01_sfnt_off000070e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E3 20024 bytes
SHA-256: 01eeb6391fd1d0c0eb8de48fa6d83c3fd173b9a5dedd9d71342218627389572a

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