Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5432e260589df59…

MALICIOUS

PDF

47.5 KB Created: 2020-08-16 18:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3701a45d6040d05c9d9c76627f4c071f SHA-1: fe9e05466ab162dacc2953e1aa238483a1b5efff SHA-256: d5432e260589df59e57064737e7c852a71bee459b5b5253ced6819db0370559a
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.com/pify?keyword=design+symbol+template', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a deliberate attempt to redirect users. The presence of numerous links, including the malicious redirector, indicates a likely SEO poisoning or traffic redirection scheme.

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=design+symbol+template
    • http://files.fkelmusic.com/uploads/1/3/1/4/131407112/vekonenofabotiv.pdf
    • http://rotufiwa.aesklarskiokb.com/uploads/1/3/1/0/131071243/489811d3d978d8.pdf
    • http://files.tracelearningcenter.com/uploads/1/3/1/6/131637254/nupevuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/populate_form_from_database.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0631/files/weledavebeto.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/upload_to_github_from_terminal.pdf
    • https://cdn.shopify.com/s/files/1/0437/7441/0910/files/runuwifasozesewonavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/jujuvakosupudope.pdf
    • https://cdn.shopify.com/s/files/1/0433/2617/7438/files/bifunafinepibup.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7703/files/buxuwiwafadevivafitejir.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/94863443085.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/sabof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/fulajipiputiligixibuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3704/files/22818791009.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/jewoketivegorugoza.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/salamavoxusaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006055.bin
eccf467e8d08fea4c60221a36f3ddb64efdf8c204a5383c94a33ba7e55d607e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 5072 bytes
font_01_sfnt_off0000717d.bin
d9b10fb4bf39f9bb63bc6bed5bb78d11a295ade0f0d6c265782117a4bf3c991c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717D 16064 bytes
font_02_sfnt_off0000a323.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA323 4324 bytes

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