Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f2a4a854c667bf…

MALICIOUS

PDF

46.6 KB Created: 2020-08-09 14:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1e100d43c00785ca3eead957dad660b SHA-1: d8118efb0e17a2bee0a7b67b53929eb62b73f03f SHA-256: f7f2a4a854c667bf59b17f5bbbf43018cf76aabcf9e2c1c2e224e2a8145ffb69
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to 'ttraff.ru', disguised as a link to an 'agile software development book pdf'. This is further supported by heuristics indicating a malicious redirector and a link farm. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking Shopify URLs, likely part of the link farm.

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=agile+software+development+book+pdf
    • http://files.timetraveller.sg/uploads/1/3/0/8/130874566/ragukexos-rerevikexuv-zoratabimiras.pdf
    • http://files.galgositalianos.com/uploads/1/3/1/6/131637553/zonimiwokajux.pdf
    • http://files.mectacprinstructor.com/uploads/1/3/1/4/131437740/2f469132278.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/sisolewejupusov.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/lanida.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/viguzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8340/files/cours_pour_apprendre_l_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/gta_5_online_mods.pdf
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/53678375229.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/27885383657.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/85587787952.pdf
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/toradudefusimibeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/telugu_online_movies_2017.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_off00006a0e.bin
2f0eb1f1cd56cedf9d2bc860cab69969056ac3051748b1699008601a2b58a514		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0E 5492 bytes
font_01_sfnt_off00007cb9.bin
dea0b09bd77b0f6917532ba13f7ec0197e410d621c5db246c86834ea04175197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB9 10280 bytes
font_02_sfnt_off00009fd2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD2 4324 bytes

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