Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5be5c2fa1b29bc6…

MALICIOUS

PDF

38.6 KB Created: 2020-08-12 04:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e1b137426824776b4703ca205161aa1 SHA-1: 081dcd194887a3db7ab1c8abd6b3e8dc225620a8 SHA-256: f5be5c2fa1b29bc683b18f8dd290c054984648148387014939b2bad3e51439c2
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wb?keyword=50%20tons%20de%20liberdade%20em%20pdf'. Another heuristic flagged the PDF as a link farm, with many links pointing to Shopify domains, likely to appear legitimate. The document body contains garbled text but includes the same suspicious URL, reinforcing the lure.

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/wb?keyword=50%20tons%20de%20liberdade%20em%20pdf
    • http://files.yogablog.co/uploads/1/3/1/4/131406966/9110701.pdf
    • http://files.ciecanswers.com/uploads/1/3/1/4/131453810/viwit.pdf
    • http://files.townhousecarpet.com/uploads/1/3/2/6/132683080/9273308.pdf
    • http://zuses.saturnrinanewburnmedportfolio.com/uploads/1/3/1/1/131163651/8410004.pdf
    • http://konas.africaspectrum.com/uploads/1/3/0/8/130873995/2340728.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/diwok.pdf
    • https://cdn.shopify.com/s/files/1/0433/1762/4990/files/topulamilobaneriji.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/44424532842.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/14030981430.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/50168762460.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4780083199.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/51750735362.pdf
    • https://cdn.shopify.com/s/files/1/0435/9825/0141/files/nazidiledujiborisiver.pdf
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/python_machine_learning_book_by_sebastian_raschka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/pasodaduporafedibif.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_off00005794.bin
07afa67f9c3145a5c7f8306864e80802e13f6aaad3daf45ebc0eab4144e591d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5794 5500 bytes
font_01_sfnt_off00006a22.bin
4fe976c7dd8ab85e6fb055e1eaad210d35b372c8854df7b7f6e1a5b658536e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 10608 bytes

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