Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7238940471b575f…

MALICIOUS

PDF

40.3 KB Created: 2020-08-27 23:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfc0452fb9d7c2de26eec52cac0af0e7 SHA-1: 78c583a1f23885d36c464d06fef9af8b29ebad99 SHA-256: e7238940471b575f080e2fd820c6b7f1282ad72c8c663041ca3a5e569c76c2d2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=guide+posts+for+boat+trailer'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which lead to unknown or potentially malicious domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to a malicious site via the embedded redirector.

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=guide+posts+for+boat+trailer
    • http://numari.meghankelly.org/uploads/1/3/0/9/130969191/8396309.pdf
    • http://zetobemi.tonguetanglingtales.com/uploads/1/3/2/6/132695569/jefowabusufulu-kisajurodagepiw-bamuwe.pdf
    • http://zudefik.satxinspector.com/uploads/1/3/0/8/130814070/1419345.pdf
    • http://giwofi.whistleractiverehab.com/uploads/1/3/2/7/132712354/vajivibixas.pdf
    • http://doziwo.maddiehulsman.com/uploads/1/3/1/4/131437089/97ed53df.pdf
    • https://cdn.shopify.com/s/files/1/0437/0418/9096/files/assignment_of_benefits_form_chiropractic.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4162/files/bmw_x1_2010_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/adverbs_of_manner_place_time_and_frequency_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/family_guy_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/troy_built_tiller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/aadukalam_tamil_songs_free_123musiq.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0421/files/jefotujoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/9081/8712/files/pdf_edit_multiple_pages_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/workforce_tile_cutter_thd550_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/niladifasebuwaligaforafed.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/ziwumimagalamilux.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_off000060bb.bin
6d7c5cf5ac53da8c0db3572e461a36f5400c8d5c9565ee1b6134edc7d3a71e62
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5208 bytes
font_01_sfnt_off00007278.bin
cdaca3443bda975542def340d00fc2be60b302e5963ef9e039cb99abbe751dec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7278 9948 bytes