Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08c44fb6d594aa2…

MALICIOUS

PDF

39.7 KB Created: 2020-07-27 12:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e250fe1dfd19666f3bffbd5f9205d01d SHA-1: e31b94cfa29e36720065635cfbde27db9ac6283d SHA-256: a08c44fb6d594aa22d46221089a13224070a9e5734d2f946cfbbfd4b965700cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This link is presented within the document body, likely as a lure for users to download a fake graphics driver. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. 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.cc/pify?keyword=graphics+driver+windows+7
    • http://files.e-jane.net/uploads/1/3/0/7/130740492/toviwes_mosigijoborol_jixogiraw.pdf
    • http://files.hometowncoffeeandtea.com/uploads/1/3/1/8/131857114/lepokudej.pdf
    • http://files.nofakies.com/uploads/1/3/1/4/131408942/baderajudugeke.pdf
    • http://files.tiffanyavalosmakeup.com/uploads/1/3/1/4/131483235/6896933.pdf
    • http://files.veggieinternational.com/uploads/1/3/1/3/131380966/wuxewapuguxojabevo.pdf
    • http://files.tiffanyavalosmakeup.com/uploads/1/3/1/4/131483235/6896
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/lugowobulovewubunuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/45299536861.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/56971296190.pdf
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/sosakosusazexubofotad.pdf
    • https://cdn.shopify.com/s/files/1/0440/4104/4118/files/veduvig.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/rezatepusabasepazobijoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/kijut.pdf
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/bekedirupiwujipisajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/rufotoxokugar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7441/1926/files/lidaxovinegikekeruxidi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/73171262263.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/93253699823.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_off00005da5.bin
6931a6ed976552e59d75cc99abfb4778323f370337bf8651e6fbb8d8a6411c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA5 5100 bytes
font_01_sfnt_off00006f06.bin
6299c61a01ded3c59147f3ef3bca8421ad6df46df863e22a7001a48041c01d85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F06 10184 bytes

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