Malicious PDF — malware analysis report

Static analysis result for SHA-256 57cfe20b9fe67779…

MALICIOUS

PDF

54.2 KB Created: 2020-08-09 12:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 010b5039ba5666f4ec26a1397d66375a SHA-1: 33d83d5dd5c3ba272d116244a7736decf4acf952 SHA-256: 57cfe20b9fe6777949332b7a4d58692e0b10639add5b9848c094568fcccad197
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This suggests the primary goal is to redirect the user to malicious infrastructure. The presence of many external PDF links also indicates a link farm or SEO poisoning attempt.

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/pify?keyword=enchainement+d+accords+guitare+basse+pdf
    • http://lusezuzu.alamedapointstudios.com/uploads/1/3/1/0/131069934/b4729f1dc5d8.pdf
    • http://gibub.martalachowska.com/uploads/1/3/1/1/131164250/fesasunimaz_diroj_viwiweboz_zipapigejudil.pdf
    • http://files.fridaynightswimraces.com/uploads/1/3/1/6/131606111/ef6d2d1.pdf
    • http://files.mollybooth.com/uploads/1/3/1/8/131857631/tipetixabogu-futomiwaxunom.pdf
    • http://files.marcelwesdorp.com/uploads/1/3/1/8/131856270/semixutiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/giwijijut.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/56009739018.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/81451698992.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8173/files/wavadabudefezagofofulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/oxford_bookworms_stage_2_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/63222579099.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/gimatoxol.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/nagetoto.pdf
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/60755186055.pdf
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/pebukupina.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076c8.bin
9c86c4d2963fec52c700d1379d893375363a092c13f1a440ed527844f6436feb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C8 5632 bytes
font_01_sfnt_off000089bc.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89BC 1800 bytes
font_02_sfnt_off00009249.bin
69c86d97eee22f195fee801790a40b4a4031134ddf564975d3373012573de0f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9249 10224 bytes
font_03_sfnt_off0000b56a.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB56A 16312 bytes

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