Malicious PDF — malware analysis report

Static analysis result for SHA-256 187341a3903a84b7…

MALICIOUS

PDF

33.2 KB Created: 2020-08-22 09:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f2cf6e811b893139d90edb77935b73f SHA-1: cb400e01be6c77b629e69fb422880772e7a58f52 SHA-256: 187341a3903a84b7194b32aaa6432ff48509566af65300b1601c8629349b1a60
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which point to redirector infrastructure like 'ttraff.com'. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or phish users. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent.

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.com/pify?keyword=cornfield+chase+piano+sheet In PDF document text
    • http://files.elfiesrefuge.net/uploads/1/3/1/3/131383771/77dbaed666d4a51.pdfIn PDF document text
    • http://beredibo.apexengineered.com/uploads/1/3/2/7/132740214/c23e25.pdfIn PDF document text
    • http://koxojil.artofflightdg.com/uploads/1/3/0/9/130969204/9db191b27083.pdfIn PDF document text
    • http://files.blissfultransition.com/uploads/1/3/1/0/131070309/1288808.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/1/0434/5757/7122/files/xanazixira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/13749990347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/corpus_linguistics_with_bncweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puliwaxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/dufetudowel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/carrefour_qatar_promotions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/55355759545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/70131430323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99640144283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/88224235591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8011/2535/files/assetto_corsa_honda_s2000_mod.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_off000045f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45F8 5148 bytes
SHA-256: b0859fbc4a2a828f34e88b510bb51e85a9899debed640861054186602780e80e
font_01_sfnt_off00005766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5766 9508 bytes
SHA-256: d5f66c58dba35b747f9cce7a908f24226649d5595bd68737ecf2646f3c1ae3aa

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