Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc676da31638f4f…

MALICIOUS

PDF

50.5 KB Created: 2020-08-17 18:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: befa277bbfb9d50e0ac452f4812401e0 SHA-1: 64cf03fb36d0471015b9efd1db420812099c283d SHA-256: bdc676da31638f4ffa06fbb5b88e1105f14c2b913602dbe52b4370f12198d609
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=financial+spreadsheet+templates+free`. This URL is designed to lure users by promising free financial spreadsheet templates, but it redirects to potentially harmful content. The document also contains a large number of external PDF links, many hosted on Shopify, which is flagged as a PDF link farm. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=financial+spreadsheet+templates+free
    • http://files.guidedexposure.com/uploads/1/3/2/6/132695569/cd06219e7.pdf
    • http://zawadus.mieswholesalemeats.com/uploads/1/3/2/6/132683071/6636735.pdf
    • http://files.shondakirkministries.com/uploads/1/3/2/7/132740852/zoteri_xufipuva.pdf
    • http://files.bigbearlakecabin4rent.com/uploads/1/3/0/7/130738894/rugorikubosugeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/73233016808.pdf
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/nizirevufubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5599/6328/files/bazawaxegubagidokan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/zuwewaxobodotigizadabug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/ye_baburao_ka_style_hai_video.pdf
    • https://cdn.shopify.com/s/files/1/0440/2351/3238/files/bigawomimerofaxuko.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/super_amoled_wallpaper_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2957/files/the_worlds_hardest_game_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/9526925679.pdf
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/gapusojejinabazijatesomin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/91604803751.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_off00007962.bin
e542f9703b3b917d3e3074efbf887da3dd20b7691b261c8a1634b88b65393c8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 5028 bytes
font_01_sfnt_off00008a3f.bin
ea6699e00fb5270fbd705849ac2d779cb4b4a578b6afc81ec0c6115a370bbf6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3F 10788 bytes
font_02_sfnt_off0000af16.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF16 4324 bytes