Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf4d8ddfa7f9dca…

MALICIOUS

PDF

36.4 KB Created: 2020-08-06 13:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d89b1a1b8a0b049b401e2cf82d4454d SHA-1: 09cf8a7dc3c6dad4f81a9c266cb4ac6349661679 SHA-256: aaf4d8ddfa7f9dca87e7978f25b7615e0921d08f18ca8ec9c5ef012a33e855aa
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the primary purpose is to redirect users to malicious content, likely for SEO manipulation or to host further malicious payloads.

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.com/pify?keyword=magnificat+de+taiz%25C3%25A9+partition+pdf
    • http://files.thehonestcatholic.com/uploads/1/3/1/4/131453022/7602724.pdf
    • http://files.thegratitudeadventure.com/uploads/1/3/1/0/131070688/fezoriwubuzabebofo.pdf
    • http://buzera.petercosimoleather.com/uploads/1/3/0/7/130776177/xivavo.pdf
    • http://files.killchain.org/uploads/1/3/1/0/131070246/bfa22e.pdf
    • https://cdn.shopify.com/s/files/1/0429/3296/1443/files/61253490036.pdf
    • https://cdn.shopify.com/s/files/1/0433/7831/1326/files/kissanime._to_animelist.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/kaxumegirenimawipivub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/vapuvixokuwemidejajos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/vosinowiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/leziminolufapo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/xasexuwugonibasularoves.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/73543202886.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/31312517639.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_off00004c29.bin
808eb07da09875c8e984f975440509abe1315d4a32b7204a01b92e6e0156b055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C29 5308 bytes
font_01_sfnt_off00005e1f.bin
b8c6daaecf3aeb94f71a3f143444f0c2d0d5038a07950e5fcf151710b620c22a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1F 11176 bytes

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