Malicious PDF — malware analysis report

Static analysis result for SHA-256 923b7f47f97c45a1…

MALICIOUS

PDF

40.3 KB Created: 2020-08-04 22:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8a2dd767b39ed96d4ab9deb1e6041a6 SHA-1: 2fadbfb31173959f3987710da03634d6a6f638ef SHA-256: 923b7f47f97c45a1ae9a93d6f6e074079278eb40d19acb1564fd60a3ed96b0f7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user. No scripts were extracted, but the heuristic firings strongly indicate a 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=least+common+denominator+worksheets+pdf In PDF document text
    • http://files.graemation.nz/uploads/1/3/0/9/130969430/3717731.pdfIn PDF document text
    • http://files.womancarehomemidwifery.com/uploads/1/3/1/6/131637257/jimamowuso-xetawofevowuvuv-jowobolizadof-dorokebisixaz.pdfIn PDF document text
    • http://files.movewithlife.net/uploads/1/3/0/7/130739363/tezezilapofijix.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/1/0433/0687/7080/files/65496272691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/xurufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/77172201489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/gutizagakakowido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/bupaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5816/6941/files/avast_license_key_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/24530055594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/89448785594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/10514748315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.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 4

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_off00005f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F68 5460 bytes
SHA-256: 5a5768dd3f8eae19a7357818222754ac86cc7192c928b2bb77885d7853186e0e
font_01_sfnt_off000071e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E7 10100 bytes
SHA-256: 169416c952f9150db0eb2a3691b994802252f35e516e80fb830f4e0756187539

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