Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b9ecb75e7a9e29…

MALICIOUS

PDF

121.7 KB Created: 2020-08-12 00:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24b1959cdbc066026288468cc6ba6ee7 SHA-1: e8d5e84be962c4ae4b16dfba802f2b700c37632c SHA-256: 13b9ecb75e7a9e296bc6fe775a0a987b1d6b1e7c3b41f478411175a574c12aa7
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service (ttraff.cc) identified as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick the user into visiting a potentially harmful site. The ML classifier also strongly indicated maliciousness.

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=behavioral+genetics+knopik+pdf In PDF document text
    • http://files.benchmarkmasonryinc.com/uploads/1/3/0/8/130813710/rebimi-xejedegu-lipobitemis.pdfIn PDF document text
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdfIn PDF document text
    • http://xupareti.gowanuswines.com/uploads/1/3/1/4/131453540/sufazesoge_dufemujemesares.pdfIn PDF document text
    • http://files.ayusayurvedayoga.com/uploads/1/3/1/3/131380901/2653755.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/1/0435/2425/9992/files/medoxuvimagadedonalijak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/vanapaporemopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/46937539018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/15799687679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/zamojajuzitejid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2519/5427/files/gastroesophageal_reflux_disease_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/dipipowizadaleket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/agatha_christie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/61843885985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/gegujegaguzizojev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/rujumaruxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/36096916093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/positive_affirmations_for_success_and_wealth.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_off00019e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E8D 5592 bytes
SHA-256: 29b7b2b96ee9dc50f5d4dc8cb21aa195e7a20b37e9a2ffbb58f99829a68c7d29
font_01_sfnt_off0001b19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B19A 12436 bytes
SHA-256: 289c594187cb3c2f202ac675e3f00c0bf1843e4531595f303d5ca12e925ed1cf

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