Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c774eae3975b3f…

MALICIOUS

PDF

46.4 KB Created: 2020-08-30 20:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ad4ad284eba8c9bfc74203de8d221c SHA-1: b7569814b2fda42aab7d3dd2b6e8349b31f34879 SHA-256: 55c774eae3975b3f3b48e25e11bf9df12359e4a6fe6cfa59b25da5e18524a6c7
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.com, which is flagged as malicious. Additionally, it functions as a link farm, directing users to numerous other PDF documents hosted on static.usrfiles.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to a potentially harmful site. No scripts were extracted, but the presence of malicious links is sufficient evidence for a phishing or scam attack pattern.

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/wix?keyword=l%2527iphone+un+produit+mondialis%25C3%25A9+sch%25C3%25A9ma
    • https://static.usrfiles.com/ugd/fbccce_da77ddd8a03f44b1b3ca6580ce667e10.pdf
    • https://static.usrfiles.com/ugd/b8c837_46b65b3cbfeb4ae888fd58478a344f59.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7453fe166aa421cb9a6576793c7d090.pdf
    • https://static.usrfiles.com/ugd/b8c837_f52ec25b35d0407d8f27524e9b91a89d.pdf
    • https://static.usrfiles.com/ugd/b8c837_57ede5627bd64971b4976289694babe6.pdf
    • https://static.usrfiles.com/ugd/b8c837_174ab6561b664d5b82f7dc4a5152aaf6.pdf
    • https://static.usrfiles.com/ugd/10e3af_c0098f490ad3447bbdde3995ec10be9a.pdf
    • https://static.usrfiles.com/ugd/1f2646_3465b5816d5443289c0115ea8ef33bae.pdf
    • https://static.usrfiles.com/ugd/4b7290_7d082f7aa9d84cc9bc2cbb2668243073.pdf
    • https://static.usrfiles.com/ugd/f09a9d_944c15d93d7047c9b5c086555a397168.pdf
    • https://static.usrfiles.com/ugd/8b2c09_ca6bd907c37a484fa1132bf3847e7096.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bec7bd20ef2441ba72da88219e6da27.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee97749bb1d04e2f90c42d5872c6ea91.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/88527104853.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/12033097438.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_off00007153.bin
901fb5103c9aa9012e6ad72fe706e3c6d051f778ad2ce3806fae705c15507e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 5428 bytes
font_01_sfnt_off00008351.bin
c8eb223f5da8963edc4763428dc6c70aebc2265b3c86dce31fecaa378288496a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8351 12564 bytes

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