Malicious PDF — malware analysis report

Static analysis result for SHA-256 239938638889f219…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 21:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f467efbdf8ce330a8d175cd104817c8d SHA-1: 2cbc0a4b5a857b20b0f5637853957fa29c2acc8f SHA-256: 239938638889f21938846fe1899ad3d0c8898262c0a077d606ffa644dd461c81
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm. This suggests the primary purpose is to lure users to malicious sites. No scripts were extracted from this sample.

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.ru/pify?keyword=air+cooled+heat+exchangers+and+cooling+towers+pdf In PDF document text
    • http://files.psucusa.com/uploads/1/3/0/8/130814193/5dcc558203533.pdfIn PDF document text
    • http://files.erathmealsonwheels.org/uploads/1/3/0/7/130738836/6b2072cf0.pdfIn PDF document text
    • http://files.redqueenlitmag.com/uploads/1/3/1/3/131380001/18fbcbdfb5.pdfIn PDF document text
    • http://files.sacredmotherarts.com/uploads/1/3/1/4/131407102/lepawenarakegetut.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/1/0440/0594/9590/files/mathematics_in_the_modern_world_college_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/sch_campbell_sinh_hc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/tazufeweretogekasezat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/debifaninaladujavexato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/gotaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/pinebidipunovuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/badoni_sir_maths_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/water_pollution_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/minecraft_rpg_server_with_classes_and_quests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/gobixevafaxezepibar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/95358287195.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_off00007033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7033 5568 bytes
SHA-256: 8793819d7403d69dc387b1413b01a9b49da49e492768d34fefc69f888c183a33
font_01_sfnt_off00008336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8336 10704 bytes
SHA-256: e529be458440876033fc4247567c4d1268a0110dc363b0c5f2eaaaa6f209c42c

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