Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d20d5e4dfe4c97…

MALICIOUS

PDF

48.7 KB Created: 2020-09-11 04:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0257ff2f92cad51f359d0a65b62a00ea SHA-1: de82e2460266aaf7ece446124f56526023a93d9b SHA-256: 31d20d5e4dfe4c97364d2f5f2e712236ef7c843a459594408bedee70980e2809
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL 'https://ttraff.cc/wix?keyword=mail+formale+inglese+inizio'. The presence of a link farm and the ML classifier firing strongly indicate malicious intent, likely to redirect users to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=mail+formale+inglese+inizio
    • http://nefizovad.nzimahse.com/uploads/1/3/1/0/131070571/7639233.pdf
    • http://burar.brushlove.ca/uploads/1/3/1/3/131398252/a1449382fdf3d.pdf
    • https://static.usrfiles.com/ugd/2b25e8_5b951c056c0144cba3e105fafdd5197a.pdf
    • https://static.usrfiles.com/ugd/94e5ef_db1a5d83dc0d4aec84326857cbab74fa.pdf
    • https://static.usrfiles.com/ugd/b88e3d_03097e44b2224cc7b5fd460a0ffb6457.pdf
    • https://static.usrfiles.com/ugd/771ea4_16810ae38f684ebcb3586a0f8ac95461.pdf
    • https://static.usrfiles.com/ugd/a48928_f213ab41f5a64560b6e727d72e9cbf46.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_5aeb8c1d1b474e1dad1fda13993b367c.pdf
    • https://static.usrfiles.com/ugd/b7306e_396b950f73c84ea6b25c7ae311362e07.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/beech_baron_58_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/0152/6948/files/vault_dweller_s_survival_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/dagulota.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/nickelback_all_the_right_reasons_songs.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/92818880038.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_off00007364.bin
e19633d72e4e2967b2589c0a03806ed852f8906aff746cfd662063bc456c131a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7364 4848 bytes
font_01_sfnt_off000083c8.bin
e46dedf31d588e2aee667710908021bdd35b3a6f5154e5bd260c1b7a4ed62894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C8 11200 bytes
font_02_sfnt_off0000a820.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA820 4324 bytes

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