Malicious PDF — malware analysis report

Static analysis result for SHA-256 16be23138686c4d1…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 20:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac708a7ff23cf2878ffb48b9629db5aa SHA-1: 34edc8bd0b8b2673cccce4c7c216d5a123489e12 SHA-256: 16be23138686c4d1ef3e6b83a4ffc4ed90d20a863c4393e1cfa6176631e17205
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to malicious infrastructure, disguised as a sneaker size guide. This is further supported by heuristics indicating a malicious redirector and a link farm designed for SEO manipulation. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt to a malicious site.

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.cc/pify?keyword=isabel+marant+sneakers+size+guide In PDF document text
    • http://files.saintanthonywoonsocket.org/uploads/1/3/2/7/132710763/9225285.pdfIn PDF document text
    • http://mofoneg.kateyen.net/uploads/1/3/1/4/131406515/vujeb.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/1/0429/9839/9139/files/campaign_finance_reform_ap_gov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/webimotene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8708/5222/files/food_quality_control_and_assurance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0620/3803/files/59588215847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4986/1791/files/winged_knight_halberd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/83273583230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/surprise_arizona_zip_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/14469530713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9679/9384/files/canterbury_tales_sparknotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8778/1287/files/fire_engine_crossword_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/characteristics_of_bantu_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7128/2079/files/wuwidowiz.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 2

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_off0000609a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609A 5336 bytes
SHA-256: a5921d5a026e9b85e7e21b1e4692c15fc84a16e2c390a0083e3a859da8ea1503
font_01_sfnt_off000072a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A5 10740 bytes
SHA-256: 8219c2656c3de13d8b59ba65239f6e7255e8ad4ef7c32eeacf5525ab2b75d8a3

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