Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a20ab77e2771df6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 07:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c157eb729d939f98473958f5e601d4cd SHA-1: ae6e0d24c46e310b1d02b25a50e6cf9aaac84f74 SHA-256: 3a20ab77e2771df63b24c847c800166ecccf94eaaaf18e313b3d802e87513e2d
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a topic related to anatomy, likely used as a lure. The presence of a PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing and the ML_NYX_PDF_MALICIOUS flag indicate a high likelihood of malicious intent, aiming to redirect users to harmful content.

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=four+muscles+of+the+anterior+abdominal+wall
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/6228789042.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/89994396451.pdf
    • https://static.usrfiles.com/ugd/de3d83_310ffca51fab43b8b1eb686aabb2abd9.pdf
    • https://static.usrfiles.com/ugd/8d57bd_978052a051eb4cd6bc280e1061bfb6ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_85da2e815a04463ca0461b7aa322d485.pdf
    • https://static.usrfiles.com/ugd/b8c837_115ae9c193484922906247c9ee7ae7dc.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9365/files/makiwusuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/56133036079.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/2004_jeep_grand_cherokee_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/tiwuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5047/5413/files/angana_padharo_maharani_audio_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/1040/0153/files/numerologia_cabalistica_a_ultima_fronteira_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2276/files/simple_past_tense_passive_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/24260564761.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000698e.bin
1e91bb7e54c1179b9c202fee9c955b71802f59baddd6a0bdad6166abacd1a85a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x698E 5448 bytes
font_01_sfnt_off00007c00.bin
58c7e5e0a62daff144a2503a779e040cde28e2612d645a7aa761c2a4af3550da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C00 10004 bytes

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