Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fa136e9fc7e7aa…

MALICIOUS

PDF

77.2 KB Created: 2020-08-09 13:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9868fa8e595c58e09bbf287150bf0ea5 SHA-1: 6baa65bea8df7865f6fe8511e0ff1ac9fdb10946 SHA-256: 01fa136e9fc7e7aa27509e53ba7019928adf7b6ed86019c7f4c0856f05c2022b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document also contains a large number of links to external PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=livro+after+vol+4+pdf
    • http://wanupisa.bacmedicaltourism.com/uploads/1/3/1/3/131379578/df47635481.pdf
    • http://files.staywhole.net/uploads/1/3/0/8/130813710/7115585.pdf
    • http://files.melanieveazey.com/uploads/1/3/0/7/130776611/927560.pdf
    • http://files.finalfinishdetailing.com/uploads/1/3/2/7/132710655/levin_linebedanelu_vidaki_vukadidi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/11132388395.pdf
    • https://cdn.shopify.com/s/files/1/0438/5823/1461/files/23809374042.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/76836841526.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/sevibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3349/2641/files/55314362783.pdf
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/viretitorijewami.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/65561574375.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/83541332677.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/gabumilizupi.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce35.bin
efd1e25e98ba2fa87e0dcfc37931b9e384bf6f0a8bfe259e3026489b6c6d245a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE35 4948 bytes
font_01_sfnt_off0000df2e.bin
fe805bd1ee350a31e52cc698652f58870eea954f33e9e706652140c1a7ffbbe3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2E 16152 bytes
font_02_sfnt_off00011274.bin
d2110df3fb4163718797ee32824ff633c1a9197127e395aa2ffce0abc54d6cad
pdf-font-stream PDF embedded font (sfnt) at offset 0x11274 16152 bytes