Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc56b3249e3d254…

MALICIOUS

PDF

43.0 KB Created: 2020-08-07 10:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 840f8dd28c5eee0cfe736becd2456509 SHA-1: cc653217b88d8f0f3381331563225ef144f31d15 SHA-256: 5fc56b3249e3d2542d1cb5466af3226d70914c009858f1db208e97028738c77f
194 Risk Score

Malware Insights

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

This PDF file contains a link farm and redirects users to a malicious redirector URL, likely as part of a phishing or scam campaign. The embedded URLs, such as 'https://ttraff.cc/pify?keyword=dissection+of+cockroach+digestive+system+pdf', are designed to obscure the final destination and potentially deliver a malicious payload or lead to a fraudulent site. The ML classifier 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=dissection+of+cockroach+digestive+system+pdf In PDF document text
    • http://tepoxi.caelart.com/uploads/1/3/1/0/131070420/63efe03375.pdfIn PDF document text
    • http://files.bridington.com/uploads/1/3/1/4/131453429/muvojiz_xobodudiboteva_vodikekupafimir_bakisuko.pdfIn PDF document text
    • http://files.oceanwisejourneys.com/uploads/1/3/0/7/130740517/vafetuwiza-gifawevaw-pedurojuva-fexevesomoti.pdfIn PDF document text
    • http://files.kallerasinkangas.com/uploads/1/3/0/8/130874317/2793704.pdfIn PDF document text
    • http://files.dejanstojanovic.info/uploads/1/3/1/1/131164314/7519093.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/1/0428/7738/6911/files/83193351110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/22779472757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/xivusigej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7333/4424/files/treatment_of_acute_myocardial_infarction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/kaxovegevavilonumuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/51184473752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/39098650631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/86827939081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9358/0189/files/nesob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9602/1919/files/pepobi.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 7

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_off0000688f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688F 5760 bytes
SHA-256: b5b999878031e30a01c8d2e4e9e7ac6e1107b11e5d62a37bba80b496683dccc9
font_01_sfnt_off00007c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C23 10208 bytes
SHA-256: f51ead134d60243063d2347898dbc7faf8552a947f50e91b8ff5b8e16ae06999

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