Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a468a9c35dece08…

MALICIOUS

PDF

44.7 KB Created: 2020-09-06 23:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea4785ddd08d1bf9778c8446e1480c37 SHA-1: 27d9405cfec38ea17088f021760407c4d4360a37 SHA-256: 4a468a9c35dece08ee315baec3eb82e6f5655f2b0a0e292687661aea81218811
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a care sheet for a Kei island blue tongue skink. The document body and embedded URLs strongly suggest a phishing or scam attempt. The primary malicious IOC is the ttraff.link redirector, which likely leads 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.link/wix?keyword=kei+island+blue+tongue+skink+care+sheet
    • https://static.usrfiles.com/ugd/96bf9d_8fc083ba82f748e78f88ad4a0eecb95d.pdf
    • https://static.usrfiles.com/ugd/9e41f0_2ccba40a89fe4699af5b287f33809197.pdf
    • https://static.usrfiles.com/ugd/16a96a_a4ad52c6c21a4482a797f0b71a9364da.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/vefuder.pdf
    • https://cdn.shopify.com/s/files/1/0432/9118/1214/files/bosam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6325/files/rozalotesavivanapen.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/bibigojir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0160/9366/files/resttemplate_with_basic_authentication_in_spring_boot.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/4999/files/66112801326.pdf
    • https://cdn.shopify.com/s/files/1/0428/8049/9879/files/73776105963.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/gosedatufopogazererowo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/41813440489.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_off00006f34.bin
898d21f72a7ae69b2a9113de7a60eab001ab5f95f1165205056a7cf16e6ae362		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F34 5376 bytes
font_01_sfnt_off0000816f.bin
8077d49f85dba03f09b08510e7f8e7c685a0a34fb47a85213697e9dd335e2d89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816F 10832 bytes

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