Malicious PDF — malware analysis report

Static analysis result for SHA-256 99dd0f3644a8509a…

MALICIOUS

PDF

47.9 KB Created: 2020-09-04 22:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 856c31eb1ff1e8c81b199aa3c2ac5d7a SHA-1: 247b1132ca9358b912ec2ca3413f121ad1cc587f SHA-256: 99dd0f3644a8509a88472a369a77e2d8f0fe0e2d3bb71a4017cbba0127810734
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.me/wix?keyword=free++software+printer+brother+dcp-+t300`. Additionally, it exhibits a PDF link farm heuristic, with numerous links to shopify.com and static.usrfiles.com, suggesting an attempt to manipulate search engine results or distribute content. The presence of a 'download button' lure further supports a deceptive social engineering tactic. No scripts were extracted, but the embedded URLs and heuristics indicate a phishing or redirection attempt.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=free++software+printer+brother+dcp-+t300
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/possessive_adjectives_exercises_islcollective.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/nitisepevafudami.pdf
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/fakekususenegubez.pdf
    • https://static.usrfiles.com/ugd/b8c837_3613a9d2513a4ce6bbefef911945bafe.pdf
    • https://static.usrfiles.com/ugd/74e905_5f82d6f4842f4e5e8a068e0e63b8c4d8.pdf
    • https://static.usrfiles.com/ugd/4f270c_2032b2c687a14cdf8fcaa3308bf0b7d0.pdf
    • https://static.usrfiles.com/ugd/dba42a_58846b9df96049bf8b241a2cf5e7901f.pdf
    • https://static.usrfiles.com/ugd/0a51c1_a8b86b969e7a40a58afb6d13db523398.pdf
    • https://static.usrfiles.com/ugd/b8c837_32b88497fe0d4453ae700cd695b252f5.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_5d26ac81cc4948508c492182efa07da2.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_87870d35925148858fdc6722924dfc66.pdf
    • https://static.usrfiles.com/ugd/516793_0d413ff45292477c99a6118a440ec676.pdf
    • https://static.usrfiles.com/ugd/23e9be_1a9432cfc74041a3b41f89d11abad1ad.pdf
    • https://cdn.shopify.com/s/files/1/0459/6206/8127/files/aluminum_sheets_sizes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/sistema_circulatorio_y_sus_partes.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/kezovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/29389358048.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/18949557522.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_off00006fb5.bin
f8e60e478b063ffc68bc8f62ab70c9c851b28a4b78becf7344ee8d5a19418d8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB5 5736 bytes
font_01_sfnt_off0000834f.bin
665e4c17e1eeaf7f8d4f9c63d15b46a2e49a02c352ec56431eedc2954c3cd415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834F 15112 bytes

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