Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80d33643cad9f9b…

MALICIOUS

PDF

62.5 KB Created: 2020-08-29 19:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc5e99179b1f6c226de9cd1e1e397548 SHA-1: f2a698fbf08ebfb48d45512c0b948b8c2b1792f1 SHA-256: a80d33643cad9f9b259953520e5cb7657dd411e7c67dff5d3003ae3527649989
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links. The primary malicious URL identified is ttraff.com, which is likely used to funnel victims to further malicious content. No scripts were extracted, but the PDF structure itself is indicative of a malicious delivery mechanism.

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=dark+souls+remastered+enemy+randomiz
    • https://static.usrfiles.com/ugd/b8c837_03e43f3c253b4dedb96b00dbd9981e3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_da9089b82e744d2498ab6fadc3cd9248.pdf
    • https://static.usrfiles.com/ugd/a771bd_2337f56c2e0d4c8589f6af7970513e17.pdf
    • https://static.usrfiles.com/ugd/b8c837_63fa5c06e79e4155b579388d06b9f5f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a9d8c3bd2f34959b9573af6e6a70b68.pdf
    • https://static.usrfiles.com/ugd/b8c837_724b579371b74bbeb9df5a1c6cf6dc18.pdf
    • https://static.usrfiles.com/ugd/b8c837_09713577ce644ad68f9d70b570caef47.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bde1bf4d48645b9821b20ead62ea58b.pdf
    • https://static.usrfiles.com/ugd/8b97dd_1f303c66eba24072a6c5d9dc9ad7fcfd.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fc6c97f93bc4691a976cd63338b8b70.pdf
    • https://static.usrfiles.com/ugd/b8c837_559675a73b904d7ba612f4eb3e05f2b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa95854cc88841c696f29247252cd6fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_02dd6ffa13a441a082f6696bee891411.pdf
    • https://static.usrfiles.com/ugd/868401_15966d9df3a0435ea73132af7e54779a.pdf
    • https://static.usrfiles.com/ugd/b8c837_89a15ef2bbdf4668aa61d531536b533c.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_off00009c98.bin
6fac478a887cf0630be9f4cc6939cfdc70955b9c62c777a0ec02951f43017123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C98 5184 bytes
font_01_sfnt_off0000ae40.bin
99df868732d1f503bdf9b0463ce3d6b5fb760f161f5f8c1bcaa6d8c7613b4058		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE40 12960 bytes
font_02_sfnt_off0000d7d7.bin
46fb2a01408234bd2148273e8de5af6df992fba7f9b22b34c394cb2a7f70d466		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D7 16068 bytes

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