Malicious PDF — malware analysis report

Static analysis result for SHA-256 9958a825ca82b8e4…

MALICIOUS

PDF

63.7 KB Created: 2020-07-22 06:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5402e156536230c5d2239ee3a6ab1337 SHA-1: 44136c79d165962e7918687e54aa57b2969e0b8d SHA-256: 9958a825ca82b8e450e09f59e3f8e185adf0409e599b5c0c3a70b1192f784719
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. One specific URL, 'https://ttraff.ru/pify?keyword=angina+pectoris+pdf+file', was flagged as a known malicious redirector. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its intended lure.

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.ru/pify?keyword=angina+pectoris+pdf+file
    • http://files.accruemineralsinc.com/uploads/1/3/1/3/131378968/a83158.pdf
    • http://files.gracecommunitycarshow.com/uploads/1/3/0/9/130969220/vepenoginusapiz-jativofugajuko-nunaninavefu.pdf
    • http://files.iguanaclothing.com/uploads/1/3/2/7/132712193/6522241.pdf
    • http://files.amorehairdesign.com/uploads/1/3/1/8/131857117/3506377.pdf
    • http://files.heatherboreske.com/uploads/1/3/2/7/132740961/sunawexuwame_luxujunabak_vexokifugizu.pdf
    • http://files.heatherboreske.com/uploads/1/3/2/7/132740961/sunawexuwa
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/97002102801.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/26199926811.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/52934704071.pdf
    • https://jebemoma.files.wordpress.com/2020/06/50586837299.pdf
    • https://valojime.files.wordpress.com/2020/06/969641711.pdf
    • https://budukelupe.files.wordpress.com/2020/07/21395920968.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/tofokavapugebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/67900280607.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/tamujiberapomutafajijegi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/83966669451.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6930/files/sikomerovimamine.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_off0000b2dc.bin
025e3aea6285cb286a93f8522c49148f574171d247336fbe80ecfa4c7c763404		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DC 5100 bytes
font_01_sfnt_off0000c43b.bin
8c29eea12c12d3ef8b56fa3dd80d9c90924f2fe8ad1c2a9dc5d07a60ec1a0df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC43B 14624 bytes

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