Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b81405587a50eb2…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 18:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a4816e1a0f27db95ede19ff794408ca SHA-1: 7db58eef346e44d810179dd7ff438e872f74d406 SHA-256: 8b81405587a50eb2a0ed126b3c2f171b900e726538cb9c97156f71214234ffd5
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it's a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and a search query related to electronics, suggesting a lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to static.usrfiles.com, likely to improve search engine ranking for the malicious 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/wix?keyword=32+inch+tv+with+built+in+dvd+player+asda
    • https://static.usrfiles.com/ugd/b8c837_1f2e5d2036c146418585a26300aef531.pdf
    • https://static.usrfiles.com/ugd/b8c837_a70d14e4017c4f3e9b472845f8e7e8a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4599b1e1f34d4d9885625c493d52c647.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_56704f7d3ff04edfb2e3864308b8d776.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9a476d06f4149d8891dea33996ddab3.pdf
    • https://static.usrfiles.com/ugd/b8c837_278e3a57eae84c0eab8999e0be6f1c5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_662fc99ef5f64949ae2c97a62ca28da3.pdf
    • https://static.usrfiles.com/ugd/b8c837_664249c81da44ab2969ba9e06293e833.pdf
    • https://static.usrfiles.com/ugd/b8c837_efefcd1dc6be4d60a5485c2ced8d6de7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6130db66aeb4747bc5fd1d2e16091de.pdf
    • https://cdn.shopify.com/s/files/1/0433/2781/5833/files/kathi_telugu_movie_naa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0435/8252/1503/files/analyzing_data_with_power_bi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/25558363493.pdf
    • https://cdn.shopify.com/s/files/1/0439/8225/8334/files/10180368638.pdf
    • https://cdn.shopify.com/s/files/1/0428/3868/7900/files/27032401926.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_off00005a62.bin
5edb5c8f99080dc86cbf499c1172dfb6f45f13631aaa03a647b6da7206b89e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A62 5756 bytes
font_01_sfnt_off00006df0.bin
9d67369ccd0384c9d9037371448cf3180b404640394664b283908e4158390380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF0 14456 bytes

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