Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6fab0b66defab32…

MALICIOUS

PDF

43.3 KB Created: 2020-08-15 11:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc654e3f76d7ddef1c5e39df41231212 SHA-1: 74b766e9cb7a4907518996ebb98e79b30a4290ac SHA-256: d6fab0b66defab32dbaff66c8107bc74ec18a1abe4fce60505f3d685c9f37f89
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector at `ttraff.cc`. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL `https://ttraff.cc/wb?keyword=puzzles%20and%20riddles%20pdf`, suggesting a lure related to puzzles or riddles to entice users to click the malicious link.

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/wb?keyword=puzzles%20and%20riddles%20pdf
    • http://retobe.burtonsmaplewoodfarm.com/uploads/1/3/1/4/131406717/3830741.pdf
    • http://faxotaru.carmenpuscas.com/uploads/1/3/0/8/130814328/f987ef8be5e.pdf
    • http://mizotono.rosannecoty.com/uploads/1/3/2/7/132741593/6706041.pdf
    • http://zalidifit.showyouwhatsreal.com/uploads/1/3/1/8/131857445/fopasago.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/digikawilukukomepuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/9413/7249/files/bls_book_2020_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/blue_book_of_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/46056092283.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/bipolar_disorder_screening_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/5759901314.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/talamubimi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/file_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/pizaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/torogapegipilotajo.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_off00006c44.bin
9ed97d984dac9fcb95d23c1e3f840f2360566b3c7e122539d8700f8fc683e311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C44 5088 bytes
font_01_sfnt_off00007da1.bin
708bd427246cc317b79c0fdbe8f2ca733d8f261f5bd514b3091613de6f99526f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA1 10208 bytes

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