Malicious PDF — malware analysis report

Static analysis result for SHA-256 296f74c41e770ce4…

MALICIOUS

PDF

41.5 KB Created: 2020-08-01 13:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e85dbb0bcebeae715ece2b1f22f65d4c SHA-1: 1dc6528b36756c8457fc15ee7ef6f8f6fd7800bb SHA-256: 296f74c41e770ce421775f5db06902e18bd60db70cb20e7ba753108d9f9287ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a 'full text pdf' search, which aligns with the redirector's purpose. The presence of multiple shopify.com links suggests an attempt to blend in with legitimate content while directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=animal+farm+full+text+pdf
    • http://files.tccoloradobaseball.com/uploads/1/3/1/8/131856134/bajafumeg.pdf
    • http://files.granolaee.com/uploads/1/3/0/7/130776640/walelo-tozuladino-sijepijum.pdf
    • http://files.18asolutions.com/uploads/1/3/0/9/130969982/wilobanome-robavegeborina-sexuzugek.pdf
    • http://files.washington-scottish.com/uploads/1/3/1/3/131398447/xavis.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/49376757040.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/82751118317.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8999/files/xusejivobasetajuvuxul.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/63062525637.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/60139464330.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/rolumexaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/titizurulurani.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/78179264158.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/mawuvodareg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646f.bin
44895ded39f10de70a2cd52a1853d910d3e88193567e4e0db8186f81426c8cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 5068 bytes
font_01_sfnt_off00007598.bin
5cace221bce34a78eb7434ac1593eb5fb1cdb57fa97c0bae2b8f94796ce0923e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7598 10492 bytes