Malicious PDF — malware analysis report

Static analysis result for SHA-256 178c230a69b93566…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 10:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 013029cd19bf6076a7250694bb5d559a SHA-1: 44c4a39733a1597f7fe80414a7cd8a1206381bfd SHA-256: 178c230a69b935662fe08f2dd2c98fdcb1cbf53a64c69bf02fc33c910f8bdb9e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, many of which point to a redirector infrastructure. The primary redirector URL is https://ttraff.cc/wb?keyword=faulty%20comparison%20worksheet%20pdf, which then leads to a link farm of other PDFs. This behavior is indicative of an SEO-based phishing or malware distribution scheme, aiming to lure users to malicious content through seemingly legitimate documents.

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/wb?keyword=faulty%20comparison%20worksheet%20pdf In PDF document text
    • http://files.motherlodemontessori.org/uploads/1/3/0/7/130775596/bopekizu-zudolavupuwamas-wonanorev.pdfIn PDF document text
    • http://files.danbychurch.org/uploads/1/3/0/7/130775911/debibakobasunez_winanuxogo_jefukuluzo.pdfIn PDF document text
    • http://files.stemtech241.com/uploads/1/3/1/8/131860645/4135170.pdfIn PDF document text
    • http://files.recreatestrengths.com/uploads/1/3/0/7/130738881/rososalevixaliteb.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/1/0429/2853/7753/files/tapuvilerifizobiliw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/43492379835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/como_vencer_el_cansancio_cronico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/64562695443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/puneberun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/xetovuropixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/120_pounds_kg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/74831519869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/23059295447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8962/3208/files/71848410850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2728/7451/files/bachianinha_1.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 6

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_off00006c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 5608 bytes
SHA-256: 93103f30f2a2575f59292e95f823f2f6532ff89b81ba7aef4a18d9d7be0715dd
font_01_sfnt_off00007f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 10772 bytes
SHA-256: c4dc2a403970c1a99953d1119e52d2776d7882a9424d0ab301309a941f85c0aa

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