Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aecc7360dcf1f81…

MALICIOUS

PDF

32.8 KB Created: 2020-08-31 17:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8978fe9bb3a1c53c3654901912c03b1 SHA-1: a535fa050e8074cdc3ccfcf6a110c4fab5a6814b SHA-256: 7aecc7360dcf1f812eb6404ef0249a5c4417a658e0edd3e453e2e31801d601fd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.link/pify?keyword=we+don%2527+t+talk+anymore+video++free'. This indicates a phishing or scam attempt disguised as a search result. The document also contains a PDF link farm heuristic, suggesting it's part of a larger SEO manipulation scheme to distribute malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/pify?keyword=we+don%2527+t+talk+anymore+video++free
    • https://static.usrfiles.com/ugd/10a4aa_ea402a4c31aa45ff82cd8d3b55390b80.pdf
    • https://static.usrfiles.com/ugd/fe83c3_ef957140594f4bcb99acbc1d0d0b72bd.pdf
    • https://static.usrfiles.com/ugd/dd6616_0fa929696a074e3ab3386e4bd7b488e1.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/78039186029.pdf
    • https://static.usrfiles.com/ugd/cec570_b27254017c2e4209a4d7146b1de53486.pdf
    • https://static.usrfiles.com/ugd/a771bd_72ddf7d5a1bb4eea84e40a7ecf7d96cf.pdf
    • https://static.usrfiles.com/ugd/f55bec_ed59c6f3f04a4323a78359f7de6a4fe0.pdf
    • https://static.usrfiles.com/ugd/5cf23b_b1b27bff17124427a0be940e9b1d00ba.pdf
    • https://static.usrfiles.com/ugd/345929_d1ddb0093a9249de82be6ed4e46bce5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_82ca98d220124fa3a1cbac718eb95ff2.pdf
    • https://static.usrfiles.com/ugd/c63dba_810b7cf62e374f918f4d41b16837effa.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_off0000404b.bin
324419a6cc58fa9c1669e4f3b0900c7227afa3524f8a39d98b22b1d78396a662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x404B 5148 bytes
font_01_sfnt_off000051da.bin
3da70efde7cbd72b4e86f613259e7ea332418bdeaa91b79e37557c6a1c277b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51DA 12536 bytes

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