Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb6085530c826ee…

MALICIOUS

PDF

45.4 KB Created: 2020-08-11 09:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ecb2b131c32ae1d8ea7408f3166e4567 SHA-1: 11f3ede4e91ccc7ecc8287d04950576216506c4d SHA-256: feb6085530c826ee64d00686603094b9cc3450d8e31542486e0c6a69e978041b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files hosted on various domains, including a large number on cdn.shopify.com. One of the primary links directs to a known malicious redirector at 'ttraff.ru' with a keyword suggesting a lure for a 'critical thinking test'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the extensive link farm and redirector suggest a phishing or content-luring 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/pify?keyword=critical+thinking+test+pdf In PDF document text
    • http://files.lazuliliterarygroup.com/uploads/1/3/1/1/131164402/4831477.pdfIn PDF document text
    • http://files.jroseweddings.com/uploads/1/3/1/4/131406717/005b8e6508.pdfIn PDF document text
    • http://files.blmslibrary.org/uploads/1/3/1/6/131606644/ebdfe5.pdfIn PDF document text
    • http://files.readysportsstore.com/uploads/1/3/2/6/132681207/0248fcec.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/1/0428/1440/6823/files/japewotifiworogeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/fubav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/13574170078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4122/4861/files/vasopomigani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/nixotobalaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/oblivion_darnified_ui.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/86737930493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/movuzofajipaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3017/6159/files/longman_academic_writing_series_1_teacher_s_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3111/6448/files/nosulojegugojesirizupifab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/pasope.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_off0000766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766E 5388 bytes
SHA-256: 78be072bb4bbd3bcbe66236e66abc509e1b04f2012096d6ea1bac90758f6d51a
font_01_sfnt_off000088ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AB 9436 bytes
SHA-256: fbde1c9b4f5954fe7f4342b52223247b6d84141e75ed8ba74dd552702277c4ef

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