Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc7fd4fb91c4a15…

MALICIOUS

PDF

42.5 KB Created: 2020-09-01 19:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bb021082c720c44e977434d5e6bc4f9 SHA-1: 02c73d9d53b2cf6757c1f07d4d9698c4c8b7f979 SHA-256: bbc7fd4fb91c4a15390f4d7335a746897e5ff7f5612426ae828c522e21a76f9a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one identified as a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious infrastructure. The presence of numerous links, many hosted on static.usrfiles.com, indicates a potential SEO poisoning or link farm tactic to distribute malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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/wix?keyword=sc+caste+list+in+ap+pdf
    • https://static.usrfiles.com/ugd/111c46_de4f876ea37848a9a25021477801acb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_352760b18915450b8498e5fa2d09abc4.pdf
    • https://static.usrfiles.com/ugd/df4650_2b1e89b9a7ce42dda6c53b8e8d339597.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/23743643976.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/mibebikokoja.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/8265666865.pdf
    • https://cdn.shopify.com/s/files/1/0432/2987/2292/files/sims_3_teenage_pregnancy_mod_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/bozijenomujumufinazumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8940/files/body_beast_schedule.pdf
    • https://static.usrfiles.com/ugd/b8c837_83ed7fecf43645cf9dda821df40c48f0.pdf
    • https://static.usrfiles.com/ugd/a382ee_4c92bdecb2b04309997caf90f76abfb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e551826a3394389b3bcb35e37064770.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_off00005b2c.bin
8aacc414ffb32506402209d57cbde8bfbe2de96a46a141af5fb11ec696866cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2C 4836 bytes
font_01_sfnt_off00006b9c.bin
d9fa6f0f1f2387510f473e8e8fb2363ea664f0ac62507c06d6a25fce4c955ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9C 10504 bytes
font_02_sfnt_off00008f3c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3C 4324 bytes

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