Malicious PDF — malware analysis report

Static analysis result for SHA-256 38402c27ccba4336…

MALICIOUS

PDF

67.1 KB Created: 2020-08-07 14:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 33f592e5c00fa1d9012aea6b91a8306e SHA-1: 195cc6f2947a01991503bcda98a5d49591543fc9 SHA-256: 38402c27ccba43367d91b404407f72d56cfe5cd0aa1ffa97f7d119e83d41b455
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.com/pify?keyword=chromosome+painting+pdf' is a primary indicator of malicious intent, likely serving as a redirector to a phishing or malware distribution site. The document body, though heavily obfuscated, contains this URL, reinforcing its role in the attack.

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=chromosome+painting+pdf In PDF document text
    • http://files.kgarciaclassroom.com/uploads/1/3/1/4/131407061/sexitexelotebiko.pdfIn PDF document text
    • http://pitunid.monikasmekot.org/uploads/1/3/1/0/131070374/vijos.pdfIn PDF document text
    • http://files.annacrafts.net/uploads/1/3/1/4/131453960/ed3c9a9068ad.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/1/0435/7931/0239/files/expanse_reading_order.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4319/0946/files/podexiloxop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7686/8504/files/wisovaxetupulabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/20238926547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/kurekobogutuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/zalubotum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/43939776384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2041/8198/files/campbell_biology_7th_edition_concepts_and_connections.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/7310588020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8784/6806/files/network_diagram_tutorial.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB526 5328 bytes
SHA-256: 3ebfaa68acf1dd4511b60e7755b48fc2ac86cbb259a96821ac881fc9b26c8dd5
font_01_sfnt_off0000c716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC716 10376 bytes
SHA-256: 6f5d0b847e84b53b35dacbc19fe5d18393dded91e535dfb0e0c15456e45a409b
font_02_sfnt_off0000ea7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7B 16148 bytes
SHA-256: 43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7

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