Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56152b1156f6aa6…

MALICIOUS

PDF

44.5 KB Created: 2020-08-12 21:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 65dba7a328e863ade37c23a485f08ee9 SHA-1: 588799e707ff9f3269f72bcb70bcd65aaa59dd40 SHA-256: e56152b1156f6aa64387d481b31c8a6632eeb80ca2a3c55143cb9e1d9449384e
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is part of a link farm designed to obscure the final destination. The document body, though heavily obfuscated, contains text related to academic subjects, likely serving as a lure to disguise the malicious intent of the embedded links.

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=the+law+of+multiple+proportions+pdf In PDF document text
    • http://files.pecd.us/uploads/1/3/2/6/132681488/kafok_xefexelata_vufep.pdfIn PDF document text
    • http://files.verdantmindandbody.com/uploads/1/3/2/8/132814463/7714687.pdfIn PDF document text
    • http://files.mendenhall-lab.org/uploads/1/3/2/7/132741052/xorosopabezad-dixigaseme-bomal.pdfIn PDF document text
    • http://files.echunga.org/uploads/1/3/2/6/132681482/49a3c.pdfIn PDF document text
    • http://files.corefitathletics.com/uploads/1/3/1/0/131070378/ce37733f2d58ac9.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/1/0431/2255/7095/files/38083928643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/31896856950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/pozodif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/58601028246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6827/7415/files/lewajimixor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/xabaxabolokimafesabeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/zegisarirodurideke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/glass_facade_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8702/6590/files/91269752762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/34629336880.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_off00006f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4C 5324 bytes
SHA-256: 323badf1907c78046625737dad1273e5abab2c82a2443f0779a7f0435567af19
font_01_sfnt_off00008153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8153 10560 bytes
SHA-256: 34ece0ea086a91d7c3ab46bd67cd1c73fc5e5b20e6e01e72e9f5ab32e0e67198

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