Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d95c3121a1447d2…

MALICIOUS

PDF

33.7 KB Created: 2020-08-26 15:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66a83702ca448e85c90a902745f24fa9 SHA-1: e46c440dfb09bc416cea7cc519b445f8f29b5112 SHA-256: 6d95c3121a1447d216f906d17f800bb58117991c8f7b5c65d93f10cf763ebf88
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links directs to a known malicious redirector, ttraff.com, which likely serves as a gateway to further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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=clasificacion+de+barrenas+de+perforacion
    • http://pupefinax.robynpforrryan.com/uploads/1/3/2/6/132696063/pegekepogon.pdf
    • http://dimeluvev.gtmhic.com/uploads/1/3/1/8/131871390/3fe58a854801b5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/34863979583.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0428/7486/3772/files/fight_club_full_movie_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/kitim.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5974/files/basic_computer_knowledge_in_bengali_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67295211500.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7957/files/ketinuzavobopulopewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/install_android_auto_on_2016_mazda_6.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3483/files/42660659950.pdf
    • https://cdn.shopify.com/s/files/1/0439/0453/2648/files/77710446378.pdf
    • https://cdn.shopify.com/s/files/1/0433/9423/6572/files/camping_and_cabins_guide_florida_state_parks.pdf
    • https://cdn.shopify.com/s/files/1/0459/8602/1543/files/44101914755.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_off000045bc.bin
4af30307b8579a1ce287bc0809b612d7466adf59792b3b15705cb6aa4873bef6
pdf-font-stream PDF embedded font (sfnt) at offset 0x45BC 5196 bytes
font_01_sfnt_off00005764.bin
ce0598e2fcbc123cac2c98d0ef37d30423ffa4037ed30d30353eea10aeb4e884
pdf-font-stream PDF embedded font (sfnt) at offset 0x5764 10108 bytes