Malicious PDF — malware analysis report

Static analysis result for SHA-256 a172896b8c0580ec…

MALICIOUS

PDF

43.7 KB Created: 2020-08-06 01:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a512d3801bf6184af86713bb239e152f SHA-1: ed17bc10cf92211427fb6098454b2bf4078430e2 SHA-256: a172896b8c0580ec5a481684cf7e57c89305aa688b21555e24cb3259a6193b29
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 Shopify domains, but one critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=astm+b117+18+pdf'. This suggests the document is part of an SEO poisoning or link farm attack, designed to lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=astm+b117+18+pdf In PDF document text
    • http://files.healingwithjeannette.com/uploads/1/3/0/7/130739810/kufax.pdfIn PDF document text
    • http://files.wcchakrahealing.com/uploads/1/3/0/7/130740112/gizusofikoj.pdfIn PDF document text
    • http://files.veliteathletics.com/uploads/1/3/1/0/131070597/8419063.pdfIn PDF document text
    • http://files.openmindimprov.com/uploads/1/3/0/8/130814056/7fe77a2.pdfIn PDF document text
    • http://files.victoriavapors.com/uploads/1/3/0/9/130969993/veves-depuxotadefit-fadojekefova.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/gowavofopinesifaremoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/talelusime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/bubawadaruro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/lelatamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/pozizalekebexitib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0255/8621/files/mutomiganu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3181/1480/files/65458307388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/99444850794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/37370926368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3303/2864/files/siwenisodiwobakawodakadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/fumofetafamerosijiginafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/ashes_remain_on_my_own.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rofimoluxita.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000623a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 3080 bytes
SHA-256: 0fcef192c95d6fd4d5333de3e5f0a04c8525a73f6e29f4febd37223f58d6e746
font_01_sfnt_off00006d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D43 5304 bytes
SHA-256: a5cf20b823ab98fea78505319d2c5647db30236c06a0453424f202c35f50d1e3
font_02_sfnt_off00007f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 10088 bytes
SHA-256: 5371a25538c15f141fa9ba1b2848ad6a018c89116582682370754aeee00ba103