Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcf15fa0a1895da…

MALICIOUS

PDF

76.3 KB Created: 2020-09-09 09:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 420f818979237e3f4094b85d31a849de SHA-1: 0bbe635b266309ed2e817a9d018a99a3b631d4de SHA-256: ebcf15fa0a1895da53f61ddf667583002ba0beda6581576e2f01461aca16aa3c
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of embedded links, indicating a link farm likely used for SEO manipulation or to distribute further malware. The document body, though heavily obfuscated, contains the primary malicious URL and references to other benign-looking PDFs hosted on static.usrfiles.com. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/wix?keyword=insanity+fit+test+sheet
    • https://static.usrfiles.com/ugd/fdd6c2_208ee66a0b84425d8734d0953a006fc9.pdf
    • https://static.usrfiles.com/ugd/50988c_8d91d66d0afa4db38248e9aa3ba0a81d.pdf
    • https://static.usrfiles.com/ugd/b8c837_def89ea1257645e09c74abcd83d51160.pdf
    • https://static.usrfiles.com/ugd/26938b_e83f58d1f83d4dcc85ee63b355ab6cd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_442a99682b674e5989cf22ddb6f6c15f.pdf
    • https://static.usrfiles.com/ugd/60e703_43aa9139d7394a01bf7b628664ac75b0.pdf
    • https://static.usrfiles.com/ugd/a91264_4469db7658704391950a573254739d1e.pdf
    • https://static.usrfiles.com/ugd/d7d6cd_418e54a616ab48fcb5e00a19a4a7655b.pdf
    • https://static.usrfiles.com/ugd/52b593_ca58058af3cc46cf865bddf92736a79c.pdf
    • https://static.usrfiles.com/ugd/34e21e_7a5d8754a28d44ae96f1999b0575ea47.pdf
    • https://static.usrfiles.com/ugd/5ed537_926e4e847faa44b887e73b40ac73baf9.pdf
    • https://static.usrfiles.com/ugd/804ff6_a756c8a3782040b39d4881b8adb750a7.pdf
    • https://static.usrfiles.com/ugd/de60da_a37c409ce6d943d89c79053dd281d3e9.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_off0000c55e.bin
ce0a060c3c9aaf482f66a52ab2b6b651297563b36e8b2cb0e4ef5054c1ed9e65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC55E 13480 bytes
font_01_sfnt_off0000f099.bin
000c5ff2a0bcc98ced85cdb0268420097ab107a4632337bb733dd0fef9bbb7d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 4764 bytes
font_02_sfnt_off000100d8.bin
81c23daf9d41037e3f8927baca2339d0faa0e30b80ff04841ee48b3f221319db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 10456 bytes

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