Malicious PDF — malware analysis report

Static analysis result for SHA-256 01307cb4e466b8d7…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 06:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 113c069a88cb32bff2df95632e9f0781 SHA-1: 4159cf051555adcf80d7e32a7d3d0f7d62948c58 SHA-256: 01307cb4e466b8d74e56f1cae11fead9863b96900dbff5dc0c13d26a07c4bd4f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to the known malicious domain 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated 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.ru/pify?keyword=acidosis+lactica+por+metformina+sintomas
    • http://files.lvapparel.net/uploads/1/3/2/6/132681501/a6a10c88.pdf
    • http://wozir.nomadsadventurequest.com/uploads/1/3/0/7/130775726/9193639.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/tadejugisopeterese.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/70222631425.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/jaruwedamaxuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5227/7670/files/xadowozizabinuteminorumad.pdf
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/19195856405.pdf
    • https://cdn.shopify.com/s/files/1/0439/3834/9211/files/insomnia_stephen_king.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/54559274707.pdf
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/akhnaten_glass.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/narux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/gebavibirafez.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000659a.bin
ea54feb1efca8de0163dbc5dcee7174c9d7f6d099aae7f05b884935af30c8100
pdf-font-stream PDF embedded font (sfnt) at offset 0x659A 5288 bytes
font_01_sfnt_off00007779.bin
c8d17664622b288c7b9ab7e0f01ed082ace6087f08300bc576afde79529f5b4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7779 9748 bytes