Malicious PDF — malware analysis report

Static analysis result for SHA-256 8362c544dcc42cfa…

MALICIOUS

PDF

55.9 KB Created: 2020-08-01 10:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a2ea18553413ad6035601f3d5d30458 SHA-1: a05b31d4e163d0fc0db5a34b2275ec8315a4427d SHA-256: 8362c544dcc42cfadeca49da716e3e8e68c9bef42ee7bec998bdd5101a2e1268
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body also contains a call-to-action phrase, suggesting a lure to click the malicious link. The primary malicious URL is ttraff.ru, which redirects to a Craigslist-related search term, likely a social engineering tactic.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=craigslist+boise+furniture+by+owner
    • http://files.marioamutis.com/uploads/1/3/1/4/131437157/744474d02.pdf
    • http://files.jennifermagid.com/uploads/1/3/0/8/130813141/zifakifo-vilos-vabasuwup-dajasakor.pdf
    • http://files.northlimeorders.net/uploads/1/3/2/7/132740327/503271.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0490/files/47598079335.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/46289532277.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/lalovuvaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/86434716037.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/pisomimejezobonizifufa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6820/2901/files/mususetaronosanavulukotaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/gixaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/xegarigibabini.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/ribosupasegewawabafose.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/mefebopofatunepaforokun.pdf
    • https://cdn.shopify.com/s/files/1/0439/1501/8392/files/59174216464.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079f0.bin
ea74c3a7deb83908f875a4304a762c35160823bae56dbef351b1136d5e945a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F0 5176 bytes
font_01_sfnt_off00008ba5.bin
5b39e9209f2f5823ace8c91dcdd9d22e48f67d4c3a8bd5da9fa9055417ac3ba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA5 2576 bytes
font_02_sfnt_off00009564.bin
68ec2150961c466b13cf2c28fdb59c8cd80c24bea47a186fd0861673c186fe11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9564 10184 bytes
font_03_sfnt_off0000b872.bin
735e795b4d16529a49140ac7f40a22111760e3f1c48d6bea317f9a0d5f86c05c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB872 16780 bytes

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