Malicious PDF — malware analysis report

Static analysis result for SHA-256 58294c02e1adba30…

MALICIOUS

PDF

42.6 KB Created: 2020-08-27 14:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adbac9e9019e8d1cb9dd224debeef77e SHA-1: d18f2aa356b3b4e7847e3dcc7ffd89a6ec604831 SHA-256: 58294c02e1adba30179656e41607bd3a76ed1fd3a6f61d80d7132553e21a0e84
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that redirect to a known malicious domain, ttraff.ru, disguised as a 'Farkle score sheet pdf'. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious redirector links is sufficient evidence.

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.ru/pify?keyword=farkle+score+sheet+pdf
    • http://files.lisawisdomartist.com/uploads/1/3/1/4/131483138/8ebbd45.pdf
    • http://files.marsworthschool.co.uk/uploads/1/3/1/4/131438523/ledojir_xejifuji_losifij_welasazisifuriw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/4998603354.pdf
    • https://cdn.shopify.com/s/files/1/0434/5026/9849/files/zamobuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1356/files/english_test_for_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/2526/7877/files/kivesefip.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/70610586713.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/inscribed_and_circumscribed_circles.pdf
    • https://cdn.shopify.com/s/files/1/0429/0913/9110/files/tafim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/lucky_buck_mineral.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_off00005bfd.bin
732dba4eadbc4c2e0359dc12cb701e466caf79356c61d5796be5a3775d5ac23d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFD 4896 bytes
font_01_sfnt_off00006cb7.bin
3ffc9fcdb28e81221940f2a61747f9d549c6bc5c9337a935fa24ddd55aabf77f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB7 10364 bytes
font_02_sfnt_off0000900d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900D 4324 bytes

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