Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5da673af25fd1d1…

MALICIOUS

PDF

44.3 KB Created: 2020-09-13 09:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ff163ce8b8422b0e28cf8de4909a32d SHA-1: 7bf989f1781001bf24e2a63fc476058cd004556e SHA-256: f5da673af25fd1d11ae78512367dee6b49643d987e83cec5f35607f0b6bab662
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Maytag washer repair instructions' and includes the malicious URL. This suggests a social engineering attack aiming to trick the user into visiting a potentially harmful site.

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.me/wix?keyword=maytag+washer+repair+instructions
    • http://vewobabu.susanberran.com/uploads/1/3/0/7/130775034/ketobuwuzajop_dobavog_susuzuku.pdf
    • http://files.evergreentrackingdogclub.org/uploads/1/3/0/7/130775429/litekipor_mufusi.pdf
    • http://winapi.rivusllc.com/uploads/1/3/1/8/131858661/5243829.pdf
    • http://files.360signs.com/uploads/1/3/0/7/130738841/bb8ae912082f8.pdf
    • https://static.usrfiles.com/ugd/f103bb_9792022b7ce247de9827a76347f604df.pdf
    • https://static.usrfiles.com/ugd/3f1130_83db181b65304bbd8c75e9fcea49f4a6.pdf
    • https://static.usrfiles.com/ugd/95089d_735857d8d9244c2f81fd9b45f9e9eb61.pdf
    • https://static.usrfiles.com/ugd/2e16aa_cd4099491bd343cfbfb10552abe9e52e.pdf
    • https://static.usrfiles.com/ugd/455f95_cb756e765c024ec3bcda48c8652ca795.pdf
    • https://static.usrfiles.com/ugd/b8c837_32e17859efe84569b320a1a9966ec6cb.pdf
    • https://static.usrfiles.com/ugd/c3f59f_c1f4cce3f59a4696b4e2514a3fe9a91f.pdf
    • https://static.usrfiles.com/ugd/7598fa_2d0aaad197e7484ebd3af83924728b00.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc521027832147eca62fe0a49f0208f8.pdf
    • https://static.usrfiles.com/ugd/3b0c81_cf51a64fa36e4473892eab47582bfe9e.pdf
    • https://static.usrfiles.com/ugd/b222ea_8b74f8f38a9e4cd9a73ee24d752a176d.pdf
    • https://static.usrfiles.com/ugd/54fa57_e104908318a3425e8f1dc76671b885f8.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_off00006d62.bin
0d91c228d2b55e44545d91c58fe553a4c9cb8b327a227c819d139a7bc2e3ee07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D62 5360 bytes
font_01_sfnt_off00007fc2.bin
a80f3bcf6202fa123efa8e021e21654f426d0206c2b5ef09cac60fcd11200063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC2 10616 bytes

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