Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56778318d8cb771…

MALICIOUS

PDF

41.9 KB Created: 2020-08-14 21:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a993cfba8c79c0a1023a8a6eca2e497 SHA-1: 787e19cc43e4ac546727ed5b32739478e7f712e2 SHA-256: f56778318d8cb7719ff4fc79cbdc394033bd26fd85be4cfc71abab3c409d5d65
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical redirector link pointing to ttraff.cc, indicating a malicious redirection attempt. The document body, though heavily obfuscated, also contains the same URL, reinforcing the malicious intent. The primary goal appears to be directing users to malicious infrastructure through deceptive links.

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=use+butterknife+in+android
    • http://files.gahaganknives.com/uploads/1/3/1/4/131410736/nilanivemagemumu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/4985659652.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/buwibozonegolixanubuzidot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/oxalate_ion_in_guava_fruit.pdf
    • https://cdn.shopify.com/s/files/1/0438/9493/1624/files/45469550818.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/umn_nmr_status.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/92754704092.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/32349548035.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/47454233289.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/97755838124.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_off000066d4.bin
fda4c66fe8276d4b54cce5892927b1df4e85a27f09cb41f9e29cf08681e86b84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 5064 bytes
font_01_sfnt_off00007818.bin
0ea4a241b54e860f6bc355a29d37c6f910680ba498680f53cf595a0bd3de1a7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 10284 bytes

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