Malicious PDF — malware analysis report

Static analysis result for SHA-256 34845965a52fdeee…

MALICIOUS

PDF

46.7 KB Created: 2020-08-29 22:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eea7631f1f19bb346f7a79337678698a SHA-1: c135eb2cdcd5f633d31e017da07b92e65bdb99c7 SHA-256: 34845965a52fdeeea945d645b9aa517c4d919db4f53d4d016620e68e6b161f07
152 Risk Score

Malware Insights

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

The PDF document 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 embedded URLs pointing to various Shopify and static.usrfiles.com domains. The primary malicious URL identified is https://ttraff.com/wix?keyword=lotro+forsaken+inn+riddles+answers, which likely serves as a gateway to further 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=lotro+forsaken+inn+riddles+answers
    • https://cdn.shopify.com/s/files/1/0449/5484/5352/files/p90x_classic_workout_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/67130842806.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/69182624905.pdf
    • https://static.usrfiles.com/ugd/b8c837_45aaa70368c748eabbcd910d550aa9b3.pdf
    • https://static.usrfiles.com/ugd/0049ca_136e3b52acfc4a9eab013a68dce21a8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9f0b932ee554fec96eb601382c7aa5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e0705abee0f43a9a43bc7cfd483219f.pdf
    • https://static.usrfiles.com/ugd/b8c837_535339157c3a470bbe0f33f86c89d5e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fe17330b13644db9c3e8dd8bee514fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_f453484c0fce4c15bf2363b5383b5521.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2326bf082a4b47879fbc8d03a44528.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e7eea281714fa3a1c0a06a05a3401c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bab08f73cad4447947d3a956546ea4a.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_9b32dcc7e3cc49c6aca21a8e7b6a4f2b.pdf
    • https://static.usrfiles.com/ugd/4dd980_1b3c3c7c04da40e39978495de95409f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_23d4e0d7390145788bea8d2e38bd1cc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9690b3e34f7743159963d5027f40e0e5.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_off00006fa4.bin
85293f225c6084cda6c5d701a69f6808e9637906d8e67b518930155ba30efd3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA4 5000 bytes
font_01_sfnt_off000080cb.bin
1a91d4df95fe302b82fcc2e441d4c676bc547daac83eddfb043c4a4030e3751d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80CB 14524 bytes

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