Malicious PDF — malware analysis report

Static analysis result for SHA-256 42070923964b7b8b…

MALICIOUS

PDF

57.6 KB Created: 2020-09-08 08:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d66d60688172bcd313b065ef0b5373c SHA-1: 29d14833d22b6ae5f8212c90d0509b3973f48afc SHA-256: 42070923964b7b8b4f896745c8e4baaad9bfbad404ea3602c3b19da196ba8ef6
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.club/wix?keyword=border+light+app+apkpure, is identified as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting a broader campaign to distribute malicious content. The ML classifier strongly supports the malicious verdict.

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.club/wix?keyword=border+light+app+apkpure
    • https://static.usrfiles.com/ugd/b8c837_cd1ce91826c9476d95f0a45d7b407795.pdf
    • https://static.usrfiles.com/ugd/47b1e8_947656e7edb04e53a6c3dcc0dc5aa26e.pdf
    • https://static.usrfiles.com/ugd/97634b_86228918a3d64e6fb1c9864088b62e50.pdf
    • https://static.usrfiles.com/ugd/aff7ca_f84b9e6f7b704ad4b1a85a94a7b1d442.pdf
    • https://static.usrfiles.com/ugd/e4d7df_6a986819a0ac4da982813092dd872b75.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/fuvagepazetejus.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/mayfair_hotel_collection_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9752/files/livros_em_neoliberalismo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kopamidije.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/27692638404.pdf
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/69254122789.pdf
    • https://cdn.shopify.com/s/files/1/0434/6976/6808/files/supply_chain_management_gestin_de_la_cadena_de_suministro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/5781/4431/files/vertical_farming_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/3409/9362/files/after_chapitre_2_franais_complet.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/mosupu.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_off00009cbd.bin
334972108696aa97e1c0a0a560e2faea4d27f39bf5a489e807df0568e4cf6954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBD 1656 bytes
font_01_sfnt_off0000a50d.bin
da0e6895255fd9bedc6df344354b2ccc1db282cd19fddf11ef791f7dda2a8372		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA50D 5156 bytes
font_02_sfnt_off0000b691.bin
d311ebd576ce94b5a1a2cd7bdd4fa9ec3ff1fe47730e856859e1046da03ab4d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB691 10048 bytes

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