Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17cb787db1b461e…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 17:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 825981edfab08e622144a0866d6d93f1 SHA-1: 5a58e8b52a7859f0d2fff26ea20c1ba7ebaeb60b SHA-256: f17cb787db1b461eb51f6308fa0087112e76c6ef1c159ee17c804e162aed2e9c
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a primary malicious redirector URL identified as https://ttraff.ru/pify?keyword=betty+azar+grammar+pdf. This suggests the document's purpose is to redirect users to potentially harmful content or phishing sites. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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=betty+azar+grammar+pdf
    • http://jugixup.artizastone.com/uploads/1/3/0/7/130775075/8885f4a53cb32.pdf
    • http://files.breconcarsales.co.uk/uploads/1/3/0/7/130776484/feweta-lozuz-fozidutux.pdf
    • http://files.home-space.co.uk/uploads/1/3/2/8/132814935/palij-mupesakugowu-wefibigolu.pdf
    • http://dumezug.youraestheticstyle.com/uploads/1/3/1/0/131070420/sutefolizeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/4727/2098/files/vidoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/wekemodugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijufetibumumupaxewaromuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/4843660957.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5813/files/98931881890.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/47216322682.pdf
    • https://cdn.shopify.com/s/files/1/0440/0264/0030/files/bridget_jones_mad_about_the_boy.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5129/files/computer_capsule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/vabojibalo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33435760041.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/smile_refractive_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/ponusasivafalaw.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_off0000659e.bin
614c18f61cd78e65c4ff01d65d84c40be35cb30fd2ac35af0d0a4dc91fbd02f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659E 5352 bytes
font_01_sfnt_off000077d3.bin
e1eefba982367456a5f7e435445f465e8dff1d5881c3749cc386337d38e12413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D3 10344 bytes

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