Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb15f281b740c602…

MALICIOUS

PDF

58.2 KB Created: 2020-08-02 17:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8f442c371d9386c3c1f799d8af8b30b SHA-1: f8d70dc89a45f93add5f64605f19779bda47d7a3 SHA-256: fb15f281b740c6020cc91dcf0b9faccd7d438a26a880e0978ce472917d7efa7d
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to improve search engine ranking for the lure. No scripts were extracted from this sample.

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.com/pify?keyword=battleships+movie+online+free
    • http://files.treasuresinthevalley.com/uploads/1/3/1/4/131407010/566527f.pdf
    • http://files.howdiebrownies.com/uploads/1/3/0/7/130775808/386d1.pdf
    • http://files.trailer-trash.com/uploads/1/3/1/6/131637150/2137036.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/80305753115.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4567/files/56719911601.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/fester_s_quest_nes.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/kaplan_series_6.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/41289693502.pdf
    • https://cdn.shopify.com/s/files/1/0437/5288/2330/files/3708663615.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/nuzuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/20255469203.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/30744937811.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/54483292136.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_off0000a66b.bin
b2cd78a36228a173ec899d9fe758508f993ca62682e5356f0626c1b6bdc41ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA66B 5248 bytes
font_01_sfnt_off0000b825.bin
43fa93156452f56bfba7e01dc020044211bc3e6e0eb231e5fd440105e8a4a176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB825 10488 bytes

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