Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f81aad69e1b0ae5…

MALICIOUS

PDF

32.6 KB Created: 2020-08-31 01:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dfaed24b9fef489a9ed7c85f0fd93a1 SHA-1: d98c6dd93aa924dd1cfd0c84e9759062abf7b996 SHA-256: 3f81aad69e1b0ae52b719b3c0e8a0567c36e68206dd2c6f01fe53d06c29ae04a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDFs. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.com/wix?keyword=yard+machine+8hp+snowblower+manual`. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites.

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=yard+machine+8hp+snowblower+manual
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/96306941335.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/best_automatic_toilet_bowl_cleaner_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/35156437973.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/ielts_listening_recent_actual_test_vol_5.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_df9e73d4d2984d8cb23c309d23515524.pdf
    • https://static.usrfiles.com/ugd/217d68_35bf98d43c9c42e8b5fed44e63869a90.pdf
    • https://static.usrfiles.com/ugd/b8c837_84029edf1b3a45da88a7fd3f60b5ca77.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7a3534579aa4e209ca9ee22a505bfdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0e00486f5c64b769699da40d123d8b1.pdf
    • https://static.usrfiles.com/ugd/cafc24_f6fd421c92074daf96dcdac59547bebd.pdf
    • https://static.usrfiles.com/ugd/b8c837_c57a39f659d94095ad8bea18dad3c719.pdf
    • https://static.usrfiles.com/ugd/c0fca2_d444f708c5ce4209b30d72f0d7bbb549.pdf
    • https://static.usrfiles.com/ugd/b8c837_5eec4bbe028b4a24be489570cf5eb964.pdf
    • https://static.usrfiles.com/ugd/79e0dc_d72c0db0b4504fcbb856082058ca5623.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7d33ede001a4b4d9225f5edc0145288.pdf
    • https://static.usrfiles.com/ugd/c0fca2_58116718b1664895a722a88ff284130b.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_off00004271.bin
3b9202a42f83ee425ec82c322fae5cf2681d1657829059a72d7e17220a8fa066		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4271 5700 bytes
font_01_sfnt_off000055b3.bin
6276bf946a633648403cbfd235d056ea7232320334cc60d7a8dde59fd7b6d724		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B3 9304 bytes

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