Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d174fc4517b448…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 11:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17c4c713280fd29ef3443a721e767799 SHA-1: 4cc62bbba046f335cad446b407e06d1246246f6d SHA-256: 74d174fc4517b44819c4c448cbc0476faedf37a3ad31554bf85f5cf6011474a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=another+love+accordi'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to malicious infrastructure, likely for phishing or to download further malware.

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=another+love+accordi
    • http://tomodell.com/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/tiwokevibupawoxizajidivas.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/topenujetumusizetamasazis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/kowukin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/xagivatagexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1364/files/52701876594.pdf
    • https://static.usrfiles.com/ugd/a48928_2286b214f20b4c058c7e29108c68cb16.pdf
    • https://static.usrfiles.com/ugd/6cf392_12eeeaf3c9d34249b19a41565887719b.pdf
    • https://static.usrfiles.com/ugd/10e3af_753e56647d684a399c4950601ec92ee3.pdf
    • https://static.usrfiles.com/ugd/b8c837_df04a3c7bfc34e81a87a5fd656363619.pdf
    • https://static.usrfiles.com/ugd/6cf392_4fb8e58c6e574e52b3aa7aa1c61baa13.pdf
    • https://static.usrfiles.com/ugd/353d00_78f2705a7a7941e38b484577cd143ba1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a586055689a44ff191ed48523f317cce.pdf
    • https://static.usrfiles.com/ugd/67f5f7_4d57ed6099e4443d81c4c1cd8dd7b923.pdf
    • https://static.usrfiles.com/ugd/b8c837_e80f3863e9394ff49499568e03ae0785.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051e1.bin
52705865e0c6d8faf24d9f51052512a92a8643c961e2fa8f4061f4ccd184f92b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E1 4684 bytes
font_01_sfnt_off000061b7.bin
daa75060d21fa9c1dfda801601858c7d1843b90214f35b2c8d560b600d7c9e14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B7 13376 bytes
font_02_sfnt_off00008b76.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B76 4324 bytes

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