Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb61369ad2db7a51…

MALICIOUS

PDF

67.6 KB Created: 2020-08-29 17:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66a4ed753a2436967fa99e8f3c39f6db SHA-1: b40bfe7554b73cc1dd3f91aea8935f18935e32d7 SHA-256: cb61369ad2db7a51715f8d0ca8fdb9508d6cbb4a1056510e69233054214c247e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.club/wix?keyword=acer+a500+specs', is designed to lead users to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents, suggesting a broader campaign to distribute malicious content.

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.club/wix?keyword=acer+a500+specs
    • https://cdn.shopify.com/s/files/1/0450/1677/6868/files/82648464210.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/fresh_prince_of_bel_air_intro_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/7823/8886/files/nuvvu_naaku_nachav_songs_free_downlo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9470/files/snake_eater_ladder.pdf
    • https://static.usrfiles.com/ugd/b8c837_8248881cd20f4675976cd3134e834118.pdf
    • https://static.usrfiles.com/ugd/b8c837_208b6b9e66bc4a1ba5edfd7a15364afd.pdf
    • https://static.usrfiles.com/ugd/b8c837_000bc242e09547fcb24826cfc25dd2c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_c07078fac9d04a0caddf1b60a8167997.pdf
    • https://static.usrfiles.com/ugd/b8c837_f387e4aade1d4fa9b16ff9bab8f379b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d96dc23e41924441aee5257b99493eda.pdf
    • https://static.usrfiles.com/ugd/b8c837_23b49f4d1d194ea6ab94de09e6916209.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1a18a5a3042493ca7f82941cbdca950.pdf
    • https://static.usrfiles.com/ugd/b8c837_f101c65fa2fe4cafa78c193f6aab79a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_857ed24481c94ea389b519aa19fffc7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb83d719e33b44a686e30bb87ddaa843.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd09c383339a480bb46b21b5c0a4a224.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a429.bin
62cceaba623f72ccb846564b6ec6fa7971a4ef251a9c3bb3ca7a8cb570c55ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA429 4592 bytes
font_01_sfnt_off0000b3bf.bin
64c6dacf20d108259b0ad86086e2890e502ca1e99b73e46bf57f5a6126bd5a6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BF 13128 bytes
font_02_sfnt_off0000de07.bin
6b038f1ab2173b6b48bbcef628362becdf0702351ad984a5ea2f0c097c0d5429		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE07 16108 bytes
font_03_sfnt_off0000f2cf.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 4324 bytes

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