Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef9c0683e2a6060…

MALICIOUS

PDF

35.8 KB Created: 2020-08-01 23:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3bf905f2ce67db36db3219e3808c634 SHA-1: 3d29f81e6e2d8ae5d770964b28dedfec427d5548 SHA-256: 2ef9c0683e2a60604e5486b788dd4280986669fa7dbac6fb372a0cbe70e42702
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, with the primary malicious redirector being ttraff.com. This suggests the document's purpose is to lure users to malicious sites via these links.

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/pify?keyword=tank+trouble+1
    • http://files.dynastybrewing.com/uploads/1/3/1/4/131438079/b1152b07cf1eb2.pdf
    • http://files.heathernormansmith.com/uploads/1/3/0/7/130739452/4187362c95a4966.pdf
    • http://files.communitybuildplaygrounds.com/uploads/1/3/2/3/132303388/1b8de03b568.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/70908049052.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6060/files/lakabisexi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7025/7320/files/xosekosifutibidikugekeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/62859312880.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0431/7030/0065/files/zefaximobi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/minecraft_bending_server.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/32965974723.pdf
    • https://cdn.shopify.com/s/files/1/0431/0640/2453/files/87763715370.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_off00005009.bin
0d24f80342313a83cb5840f65f1ed39040957e273c84b27e9bf92d08a888d6cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5009 4708 bytes
font_01_sfnt_off00006021.bin
51b029175caea8f00873b693b6c463ca2ebcacc43424efbbafdf17e1735e241b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6021 10272 bytes

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