Malicious PDF — malware analysis report

Static analysis result for SHA-256 674e01514ec7f814…

MALICIOUS

PDF

52.3 KB Created: 2020-07-22 23:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b6898395cc12be5e8c2c3937b5f7838 SHA-1: f95890dab24d3c2cf6e16d782672bcff6c0d6ec9 SHA-256: 674e01514ec7f8147eeb54e453a2efaeaad57cdad005ca4e7143921f2455b43d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are also PDFs. The document also uses a social-engineering lure, instructing the user to install a browser extension or update to view content, which is a common tactic for credential theft or malware installation. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=addition+activity+for+grade+1+pdf
    • http://files.windycityknittingguild.com/uploads/1/3/0/7/130775292/9997317.pdf
    • http://files.awakeningthedivinewithin.com/uploads/1/3/1/6/131606025/68c0d68e68.pdf
    • http://files.crestonflatsstables.com/uploads/1/3/0/8/130874286/46d9965.pdf
    • http://files.independantplastics.com/uploads/1/3/2/6/132681743/futafilam_mawizoxabov_luwepeliviro.pdf
    • http://files.otterworksusa.com/uploads/1/3/1/4/131437351/tasegus-rekafi-zeganusisaj-jigavulef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78985131446.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/76852571596.pdf
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/21103797808.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/sigipigarewesito.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://regaxunizi.files.wordpress.com/2020/06/dojudemurebojovegakag.pdf
    • https://godipuxijum.files.wordpress.com/2020/07/pedazofumemojevikebonu.pdf
    • https://zizojika.files.wordpress.com/2020/06/46969993266.pdf
    • https://bemurizoz.files.wordpress.com/2020/06/40471271889.pdf
    • https://dolajova.files.wordpress.com/2020/06/36076094702.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/87445220384.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27947700243.pdf
    • https://cdn.shopify.com/s/files/1/0430/7560/0535/files/27791146989.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/tunoxoluramosexavar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/70501101687.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/357875875.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/64250897268.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/62685700935.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_off00008639.bin
c0eca126a842bfd025bb8beffb7c643a966ede787b956792c80e3d0a8554c45f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8639 5104 bytes
font_01_sfnt_off000097ac.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AC 1800 bytes
font_02_sfnt_off0000a03a.bin
5a2f87d7adc89a680ef82cf96d6df4024a4a54b9e61ce17254cd7d4eca314079		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA03A 10028 bytes

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