Malicious PDF — malware analysis report

Static analysis result for SHA-256 f513de3f4bd37e92…

MALICIOUS

PDF

43.3 KB Created: 2020-08-18 23:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 972b79d9d0ce474260e230709351ccfc SHA-1: 582f2f9527c7914876bbe612985f90cd629acb50 SHA-256: f513de3f4bd37e929755ded97a16fc808b962d090b0a9b672bcf52a0fcfd47ba
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing indicating it links to a known malicious redirector, ttraff.com, which is disguised as a document about femoral canal anatomy. The document also contains a large number of embedded links to other PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious redirector. No scripts were extracted, but the primary malicious action is the redirection to the ttraff.com domain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=femoral+canal+anatomy+pdf
    • http://nusej.notsogrownuppodcast.com/uploads/1/3/0/8/130873822/nokosusojawedodilo.pdf
    • http://files.thejourneyinternational.org/uploads/1/3/0/7/130739204/e259b3f7ebedd2.pdf
    • http://fosukilu.randallbmusic.com/uploads/1/3/0/9/130969858/popifuke_pamemijemazidep.pdf
    • http://files.cslenergy.com/uploads/1/3/0/8/130874246/192dc.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fisebupujavilugux.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/nejalusiwofudolenuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/0937/4365/files/40668448583.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/polajumujokekafodoramo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/54609033961.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/tikixinafavizobino.pdf
    • https://cdn.shopify.com/s/files/1/0432/1961/5901/files/kumixipowakevifozape.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/99101115736.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/92_ford_f250.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006114.bin
391d429bce153a8c01b3f81af929b234d68ea08079f26343afd30d92400cbad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 4920 bytes
font_01_sfnt_off000071bd.bin
b5452f704d1541da926bc82d6b197e54b170119e4721912e2238777e7eb9a8a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BD 9624 bytes
font_02_sfnt_off00009292.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9292 4324 bytes

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