Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e149846fb2e5b6…

MALICIOUS

PDF

70.3 KB Created: 2020-08-17 00:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a2f08b18ea97df0b066442970cbe9c8 SHA-1: a9206e091ca5417084f210fe9ac09f530213f42a SHA-256: 32e149846fb2e5b6da195ac22684fd38b35273eb5091dc958b75a33d297268d5
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is presented as a download for 'critical gender theory pdf', a common lure. The PDF also contains a link farm, suggesting it's part of a larger SEO poisoning campaign to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=critical+gender+theory+pdf
    • http://files.area3apa.net/uploads/1/3/2/7/132741429/tisopu.pdf
    • http://files.cloudcity.site/uploads/1/3/0/7/130738837/e0f157edc0.pdf
    • http://fogujefel.exactdata.net/uploads/1/3/0/7/130738971/fizesotif.pdf
    • http://files.japancyclingtours.com/uploads/1/3/1/4/131437984/c4b15ca5e.pdf
    • http://files.fieldofdreamsrc.com/uploads/1/3/1/4/131438348/xazesubegeroga.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/bujukedaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/accounting_standards_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/alphabet_arabe_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8753/files/waltz_in_a_minor_chopin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/kigogevojupebakigarat.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/18182207411.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/metafegozarekonivupusosal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/44442475208.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_off0000d62b.bin
d8beb9b3580108fa952e6fccdba41c0108e91c584cd5d9e13dd76fe7940ed9f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD62B 5244 bytes
font_01_sfnt_off0000e7f9.bin
da8c5368891aca5a0ca7d4c1be40f55ae27a87212d85f9abbde609fbc7909bec
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 10932 bytes