Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe47e49d51fd5c1…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 06:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8620d903cbef9096f46bb441b9449a7 SHA-1: e8f26c543e04db23a2b2c0fff921776d8929e2cd SHA-256: bfe47e49d51fd5c139abaddf748ac5db9ff6ac983cd12be4e3a86272fb3f1a54
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to a movie title and the authoring application, suggesting a lure. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'ttraff.com'. This suggests the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.com/wix?keyword=la+pelicula+de+scarface+tony+montana+completa
    • https://cdn.shopify.com/s/files/1/0443/5856/6044/files/applied_behavior_analysis_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/81511002252.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/34246268064.pdf
    • https://cdn.shopify.com/s/files/1/0438/1219/2413/files/46265676567.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/zonalobatorevobese.pdf
    • https://static.usrfiles.com/ugd/b8c837_b71340a52ce44950926d405c7b26cc05.pdf
    • https://static.usrfiles.com/ugd/afe78f_f4100f3f21b449338b0a5079b8b54c65.pdf
    • https://static.usrfiles.com/ugd/e1c37d_e80811351fda4dddaef3d1cef9bbc06e.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_51da1885f32d4b1c8066a8049b094bab.pdf
    • https://static.usrfiles.com/ugd/6f58fb_817e6a8a36ad467fa53779765958e473.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f6e7560c76046b39e6c2e43fc9f667f.pdf
    • https://static.usrfiles.com/ugd/38eac1_ad48919470fa4c848d8758f0d93dc143.pdf
    • https://static.usrfiles.com/ugd/e2c250_3e71462fa52b482282fd41f533c13765.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/44998453654.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/fokevegivanelifor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/lebivime.pdf
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/toledefa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/cheetah_hunting_videos_free.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_off00005d3d.bin
c81161be6eebbad7bd7b499d48f76d84dd8a2421995ae330e4233b99ce510422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3D 5344 bytes
font_01_sfnt_off00006f5c.bin
90f7bb73a7bafa39480f1e53e21cdb0104cee9743cdc380b7b6a2c935b8d7012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 10080 bytes

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