Malicious PDF — malware analysis report

Static analysis result for SHA-256 de032b930b2db5ca…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 04:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9680b84fcfc0f20b647b38db521888b SHA-1: dadea239fb9083ac4c8db6ae2dc6e99895b8fb8c SHA-256: de032b930b2db5ca778b4056dd6d856dba382fc98cbcdf3f8bddfb4333c92c45
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector service (ttraff.cc), which is likely used to obscure the final destination of the attack. Another heuristic indicates a PDF link farm, suggesting an attempt to game search engines or distribute malicious content widely. The presence of multiple shopify.com URLs and other unknown domains suggests a broad distribution or hosting strategy for the malicious content.

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=feel+good+inc+sheet+music+piano
    • http://files.trevorbennett.net/uploads/1/3/0/8/130873758/5497575.pdf
    • http://files.charlietaylorphotography.com/uploads/1/3/0/9/130969680/xodupafawizukupas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84602765162.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/logojojipexenotofofuzagi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1360/3491/files/27302730110.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/46726302042.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/fezorimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/80352462501.pdf
    • https://cdn.shopify.com/s/files/1/0435/8022/7747/files/classifying_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/calvary_temple_album_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/wogegokif.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/92865452721.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_off00005f90.bin
9d6f41730d98694777d565e2d7d5f0a6c249a980d95cf53747d9bd843a7f0d91
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F90 5344 bytes
font_01_sfnt_off0000719b.bin
74e2cbbc05fc399965ff87cb735904826949b7c5a1a5b3f2008c461a072787d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x719B 14868 bytes