Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a40a66cca23ddde…

MALICIOUS

PDF

47.6 KB Created: 2020-09-05 07:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50f848fbedbb124645ae262360ff29c3 SHA-1: ab05f102223e3423f17d69dc0f30b27f7e076c35 SHA-256: 4a40a66cca23ddde7a148b3791b9facca859d56cb9f548f21c7090fb18be9215
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.club/wix?keyword=website+to++free+sheet+music'. This URL is presented within the document body, disguised as a link to free sheet music, indicating a social engineering lure. The file also contains a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted from this sample.

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=website+to++free+sheet+music
    • https://cdn.shopify.com/s/files/1/0463/1511/0565/files/chital_macher_muitha_song.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/15980319706.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/75659158930.pdf
    • https://static.usrfiles.com/ugd/c57cae_518ce632b1e54fa799d79ec3c7a75d41.pdf
    • https://static.usrfiles.com/ugd/c618e9_5f25ba02138748228d9c7fee7f90487e.pdf
    • https://static.usrfiles.com/ugd/70c1f8_c6a1e1fb361e433fbff7b7a4122e42e7.pdf
    • https://static.usrfiles.com/ugd/37428b_3fd62e7339a149278d398e80da092af7.pdf
    • https://static.usrfiles.com/ugd/e3834b_f0014e2c7bba44e6b8aff83b8393da94.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_e0c522448d994991b2d7def8bc0fe3d4.pdf
    • https://cdn.shopify.com/s/files/1/0433/3377/9611/files/52317700255.pdf
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/gugutasiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/0190/3264/files/45680094191.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62092070186.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007174.bin
32fff0456249ba1445f18ef63a2b2a0cb5e391396f6b05af8a41bc905f652685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7174 4808 bytes
font_01_sfnt_off000081dd.bin
ad9b9efcb8f2ffd5bd20a833cc398c4e38f312b3aecdd0cc1d527ad687dc2e4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DD 10056 bytes
font_02_sfnt_off0000a401.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA401 4324 bytes

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