Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72cdb1fac387f11…

MALICIOUS

PDF

40.1 KB Created: 2020-08-09 09:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9adb0a554ed5e0d242ec12bd5c7a3556 SHA-1: ed65f9c942fed00a7140b3bb95187ac7746ab4a7 SHA-256: c72cdb1fac387f11c91ae57c484f34483765683bc15575e1aac200bb4a010c58
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though partially corrupted, contains the same URL, suggesting a lure to disguise malicious content. The presence of numerous PDF links, many hosted on Shopify, indicates an attempt to create a link farm for SEO poisoning or to host numerous lures. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=brc+issue+7+audit+checklist+pdf
    • http://files.meganclemons.com/uploads/1/3/1/4/131454270/9282700.pdf
    • http://files.gbarfibers.com/uploads/1/3/0/8/130874125/9d9519ceda38.pdf
    • http://files.gmcceuref.co.uk/uploads/1/3/1/3/131398591/tepukixaveviwuk.pdf
    • http://dajalom.montanaredshed.com/uploads/1/3/1/4/131483083/1f000426df90432.pdf
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/foxalorazowekapamagetup.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/xubatitexefowulozipebub.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/workout_schedule_for_building_muscle.pdf
    • https://cdn.shopify.com/s/files/1/0436/1817/3086/files/82498836372.pdf
    • https://cdn.shopify.com/s/files/1/0433/4478/9653/files/vobobemoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/gba_emulator_for_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/free_printable_vehicle_bill_of_sale.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/roveserurusinazaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/47154366764.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixiridujafogidubiba.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/95838687787.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_off00005eb4.bin
9ecc7a18260761906c7db0b1363cd5f72d16f9b690ca71632963778edc702ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 5436 bytes
font_01_sfnt_off00007130.bin
0aca3e11a70bd2c52d4a39c2ad39e89cba7fb442308a0ac1d3862404834f305f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 10176 bytes

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