Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82ed2bdb52f11cb…

MALICIOUS

PDF

68.9 KB Created: 2020-08-10 16:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 224f9a048e41eff718a33efab77957bc SHA-1: 1309369f87e376c2a04b2a190b292258f7e0d5e4 SHA-256: c82ed2bdb52f11cb40df6c9d7b735ac763a5d2e4f9978e1298fca591ab88d20d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=becker+cpa+far+pdf'. Another critical heuristic identified a PDF link farm, suggesting a coordinated effort to distribute malicious content. The document body, though heavily obfuscated, contains references to CPA exam materials and the malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be the malicious redirection link.

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.ru/pify?keyword=becker+cpa+far+pdf
    • http://litibujid.rikkiducornet.com/uploads/1/3/1/4/131438800/bevepedovunoriz.pdf
    • http://files.killjoy.info/uploads/1/3/2/8/132816158/444fa6d86d0810f.pdf
    • http://files.jimhinesdrums.com/uploads/1/3/0/8/130874204/lejuvuz.pdf
    • http://delodig.mustbefrenchies.com/uploads/1/3/1/8/131871980/3fa43353ec6.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/wileyplus_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83260340608.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1607/files/xilemeragofivumepawuvepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/96680108694.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/tifalafedudutofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/61036578046.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/voluleguw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8716/6628/files/gurijukejim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/menopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/dalaramepofibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/31869731644.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/65027357068.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/van_halen_diver_down_songs.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096a9.bin
b27c7a011d1e25a8740c16753f32df49003034e6b6973e84691b1598814ca5e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A9 6548 bytes
font_01_sfnt_off0000a6ff.bin
abb5427f6674dac207ae5bbd5a7cec81eea6400c37c72c07d74501b3acde80a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6FF 5052 bytes
font_02_sfnt_off0000b837.bin
bc7b5360678e97545d5a0de25c338347910b848f4c1c3fcd8a41131fbe8ad81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB837 2696 bytes
font_03_sfnt_off0000c3a8.bin
faf678a3946ba2c5de62e6907b6b5e3fa106d1a912ed5d4072d5984f898f94a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A8 14140 bytes
font_04_sfnt_off0000f0b1.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 16036 bytes

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