Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d021b23a69f071…

MALICIOUS

PDF

42.3 KB Created: 2020-08-03 12:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1f1d71032e5d0689f8a6920a39d29b5 SHA-1: df5d6b7c426c82cee0d63231e17f43865db9292c SHA-256: 13d021b23a69f0711d6aee1cc8ff88b45ea62b56f62935f08c492a536f2455d1
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme, suggesting a phishing or scam attempt disguised as a free download. The ML classifier strongly supports the malicious verdict.

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=antigona+sofocles+livro+pdf In PDF document text
    • http://files.hiddentreasureboxers.com/uploads/1/3/1/4/131408954/nikunanefo_jumujebute_kevarazemaf_wolus.pdfIn PDF document text
    • http://files.kv-cleaningservices-uk.org/uploads/1/3/1/8/131856380/kamadedapetugorodo.pdfIn PDF document text
    • http://files.brazossunrisefarms.com/uploads/1/3/1/6/131637255/8459914.pdfIn PDF document text
    • http://files.fancyworldusa.com/uploads/1/3/1/3/131398195/vosesabugunor.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/1/0427/9664/6556/files/3183343314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0686/8131/files/wheel_of_time.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/31147116623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4388/8023/files/91294810524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/20458923106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/bebuwilor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/53588746664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/10148598710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/49314467008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/dufuworipidafewebor.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_off000065ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AB 5372 bytes
SHA-256: 4dab2569cfc34358a628b517e90517516fcb1faf6ec554c239fabe468be84c32
font_01_sfnt_off00007812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7812 10368 bytes
SHA-256: 3b218854a47ed7495d941babbf51bf835ae0b2944c257a592ab4c3206a2aa736

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