Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f458c272114f77f…

MALICIOUS

PDF

45.9 KB Created: 2020-08-31 04:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b29879758b0dde63f1afd73fc7f60197 SHA-1: ef48504b76c9c137432d66b380ab5cdd13ca3422 SHA-256: 5f458c272114f77f982910e761734432699b5fc8739c1a4fb207a336cb5ac94b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a redirector, which is flagged as malicious. The document body also contains text related to downloading a driver, and a heuristic indicates the presence of a visual download button. The embedded link likely leads to a malicious payload, possibly a driver or other executable, intended to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=encore+n150+driver+windows+7+64+bits
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/aviva_chomsky.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0375/files/27864589234.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/64692391672.pdf
    • https://static.usrfiles.com/ugd/b8c837_eea4112683c54a28bbe9606a482bf2ab.pdf
    • https://static.usrfiles.com/ugd/432b07_9a9a8fda501f40ebbdcc8faabf8cfe76.pdf
    • https://static.usrfiles.com/ugd/74a852_f66fd0fa7f2f452c82a7cbf0a74ea0b8.pdf
    • https://static.usrfiles.com/ugd/1decf9_608b6b82fe8b4de889377da34423b7ee.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8904/files/ruxuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4627/2162/files/free_journeyman_electrician_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/45949337750.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_0631556e45a64bbb803cab6df961292d.pdf
    • https://static.usrfiles.com/ugd/fef806_0a6362398d3d4ca6a902c391e1757813.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e0c5453f31348fdb61f172ffe9d506e.pdf
    • https://static.usrfiles.com/ugd/f46427_08cf17e19bbe4cf7b2b57476ab5deaaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_106caa7c5cbe4af1aa47af34991217a0.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000671a.bin
68028224d27f5f4160515781d2043b00ffd28eb783bbba92e28fab89291818ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671A 5580 bytes
font_01_sfnt_off00007a47.bin
d949aa345e4a347344652c349bacc05e2a7c17ac16a6b4cbf1332a97b1d8d079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A47 14892 bytes

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