Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8577bf3ff05f6c0…

MALICIOUS

PDF

39.2 KB Created: 2020-08-23 13:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01fe3bb8c248c15d634e7bcfef34ab48 SHA-1: ba8c515e3b98c6a163c0a9bd833d1d79c2f59502 SHA-256: d8577bf3ff05f6c0a5cb8c0a6927bf637f2995d41a4343f7c4668eba17a50c67
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=dimensions+guide+humans, which is part of a redirector infrastructure. The document also contains numerous links to shopify.com and other file hosting services, forming a link farm, likely to obscure the final malicious destination or to appear more legitimate. The ML classifier strongly supports the malicious verdict.

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=dimensions+guide+humans
    • http://files.connectaccounting.co.uk/uploads/1/3/2/3/132303131/nopebapuj.pdf
    • http://files.centreoftheheart.com/uploads/1/3/0/7/130776516/sekugifonopekiwe.pdf
    • http://files.fairytalejourneysbysusan.com/uploads/1/3/1/4/131483110/zapufokegopej.pdf
    • http://files.kokonfections.com/uploads/1/3/0/7/130739509/8543249ff3cac6.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/yardman_yard_bug_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4367/5560/files/wafiviwalukasefatubusixaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/5968539465.pdf
    • https://cdn.shopify.com/s/files/1/0460/1351/3889/files/ignou_marksheet_and_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/61645769786.pdf
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/catalogue_daikin_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/panda_express_catering_menu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/ranch_king_mower.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/midegidikuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6664/5916/files/dragon_ball_z_dokkan_battle_lr_androids.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_off00005e21.bin
fe03dde68eadbfaad3ea187e53e2341e41f83669165d28d4738774014e1b3940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E21 5112 bytes
font_01_sfnt_off00006f59.bin
2f9202daf12e6636f9bd66432243c8987bd8b433537f51a5396cdbceb6410cb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 9580 bytes

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