Malicious PDF — malware analysis report

Static analysis result for SHA-256 095fe85ecd5939d4…

MALICIOUS

PDF

37.9 KB Created: 2020-08-18 14:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3984794988e1381ff827c1610003572 SHA-1: bcd497d1bf716a07d15352ec0c4c1893bb8fc8ab SHA-256: 095fe85ecd5939d4b9eae12bb09d3d32232e419681d1b2d8ae980d095f57fcba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though partially garbled, contains a URL that appears to be part of a link farm designed to drive traffic to various external PDF files, some of which are hosted on Shopify. The primary malicious URL identified is ttraff.com, which is used as a redirector.

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=smokey+and+the+bandit+soundtrack++free
    • http://files.projectdental.org/uploads/1/3/0/7/130776265/1352891.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/air_cooled_heat_exchanger_mechanical_design.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/nonumovonuvosepo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1351/2100/files/redoditolutuluxaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7618/9346/files/guvoxutowonewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/articulos_cientificos_unam.pdf
    • https://cdn.shopify.com/s/files/1/0436/9213/0458/files/85510051527.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/xeveguwapotofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/tavazotakekivekokonuval.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/88199640967.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/kesigiwonowinikezazogab.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/xasedujaxowukokefupavati.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_off000049be.bin
5147445fe181e4be68d31abf7059012074da9c11be3adf19ae11de21e747c6c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x49BE 5636 bytes
font_01_sfnt_off00005cbd.bin
23eaa27cde22860d4ffdf33c01a089cda7aca84514e360999cc43fc4084c15cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBD 14740 bytes