Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5f91089b485dfa…

MALICIOUS

PDF

42.1 KB Created: 2020-08-12 11:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb6cb0e1e70abf449bd056b914f7e4c0 SHA-1: 7f83c1e94d04c9b22691557eecec0227a6d8bb68 SHA-256: ef5f91089b485dfa0d5627a15f319a3d164b5f6226fe360fb3968729d2260636
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, disguised with text related to bee sting treatment. The primary malicious URL is https://ttraff.ru/pify?keyword=tratamiento+para+picadura+de+abeja+pdf, which likely leads to further malicious content. The document also contains numerous other links to PDFs hosted on various domains, some of which are also suspicious.

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=tratamiento+para+picadura+de+abeja+pdf
    • http://wixeza.michellefairley77.com/uploads/1/3/0/9/130969742/637121.pdf
    • http://files.timwperkins.com/uploads/1/3/0/9/130969190/3571264.pdf
    • http://kifofali.massanuttenyouthbrassband.org/uploads/1/3/1/4/131406717/jekojugesokerir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/kuzewalenunarawirona.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/rugeporenumusedigerak.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/mfj_949e_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/4678/9542/files/wanekisonivawelodogolijum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/66874280327.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/keborepezege.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/xetupokumelepirorutot.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/carboxylic_acids.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/fubinuxelarobetoxezamog.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7504/files/blanchard_fischer_lectures_on_macroeconomics.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/biodiesel_processor_plans.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0589/files/metamumamitazutawobeder.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/annotate_ipad_free.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_off00006462.bin
73deb47305a55ebea0aea744cdf5692c0424d5065f2d9e59bba28b3c15b72f03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6462 5256 bytes
font_01_sfnt_off00007624.bin
3926bfef9b7db4b026678c4030453360472f9b10e2cf80367ca5b3080de4e1fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7624 10960 bytes

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