Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a02d71db21a9f1…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 03:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe0c2332a0c80d10330bcf922ccebb52 SHA-1: f299ffb91ff75600ec978acde549aa803a209510 SHA-256: d5a02d71db21a9f18ea19663b6366042500207d27f60dea11295c549268c5bce
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One URL, 'https://ttraff.ru/wb?keyword=regular%20and%20irregular%20verbs%20list%20pdf', is flagged as a malicious redirector. The document body contains garbled text and also repeats several of the embedded URLs, suggesting a deliberate attempt to manipulate search engine results or to lure users into clicking on potentially harmful links. No scripts were extracted from this sample.

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/wb?keyword=regular%20and%20irregular%20verbs%20list%20pdf
    • http://tizuxex.hgsalonandspa.com/uploads/1/3/0/7/130738531/tekoferejazeto-gusozova-paxutulisazosux-tunilufor.pdf
    • http://files.integralsteps.org/uploads/1/3/1/3/131379042/1005e6295911.pdf
    • http://files.massagebyfemale.com/uploads/1/3/2/6/132695351/9949525.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/dewalt_dw735_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/sazapijibudibep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/tilimeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/44888700112.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/denelezuvop.pdf
    • https://cdn.shopify.com/s/files/1/0433/7388/7649/files/fast_car_for_under_10k.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/54335433696.pdf
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/48015608094.pdf
    • https://cdn.shopify.com/s/files/1/0435/2399/7856/files/68250777221.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/23006215825.pdf
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/6926874971.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4586/files/spatial_strategies_for_interior_design.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_off00005e97.bin
3a96a84d63f7242580a1690a3a0ac2553cc16abdb80efeafc87b56daa9546c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E97 5416 bytes
font_01_sfnt_off0000711a.bin
1548a9d6908d709c35e3416adc3e88a30de71ee9f2a918594c20f697cb3b796a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711A 12816 bytes

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