Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6dc5d4d8cf827a…

MALICIOUS

PDF

39.7 KB Created: 2020-09-16 15:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aef70aa80ecd11e1a24a294a9bd6b25 SHA-1: 0a0855b1b9de04e71e6950538c58760a8deae602 SHA-256: be6dc5d4d8cf827aa923a3a69bccb96fbc8646b186b1a3f3c2893781783ce30e
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=how+to+triforce+on+iphone'. This URL is embedded within the document body, suggesting a lure to trick the user into clicking it. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which are benign but likely serve to boost SEO for malicious content. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=how+to+triforce+on+iphone
    • http://files.glenridgetkd.com/uploads/1/3/2/8/132815045/79b5ddd1d41.pdf
    • http://files.three54.co.uk/uploads/1/3/0/7/130739204/897474.pdf
    • https://2867e3a4-5af3-407e-8051-bcab6f7dffbd.filesusr.com/ugd/76aeb6_851b968a86fd4309b7537896c09802f6.pdf?index=true
    • https://33ee9540-75a1-4015-b872-5600e76011a9.filesusr.com/ugd/e948c1_6478a49573dc47ae9fc6883ac43b2425.pdf?index=true
    • https://bee4ac06-291f-441f-bb81-a403a65caeb5.filesusr.com/ugd/d2759c_f25156541dbd4e33bfec42cceb2c5e96.pdf?index=true
    • https://64ea7b1c-3ad5-4b93-96b7-4e08adb202f0.filesusr.com/ugd/d43733_eb3a54df576349948991b71ecdf9d31f.pdf?index=true
    • https://71405fe3-50a5-467b-a34f-8a97a0125bd0.filesusr.com/ugd/625844_2a9e79e95ad74bc9abc680c0ba73adc1.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6538/4855/files/levis_501_size_guide_uk.pdf
    • https://cdn.shopify.com/s/files/1/0463/8687/2475/files/american_music_awards_2017_selena_gomez_performance.pdf
    • https://47f732b5-665f-4ced-b145-12ce2aedc218.filesusr.com/ugd/696117_29d13f01dbae4208870eb28ae2367598.pdf?index=true
    • https://5ee7b3d5-bbd3-448e-b957-581b7710e961.filesusr.com/ugd/7d1dc9_56f65d63c1c04a06b1b45860f76fe4e9.pdf?index=true
    • https://0ba7a6cc-4c8d-4c69-abc1-cc08b7574cb4.filesusr.com/ugd/529dbf_1e1a17d4401042a485de9f2fbaebf2a8.pdf?index=true
    • 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_off00005d32.bin
859c95a52be63cab9767b20c03ac44e023c43e771acd0ae4bd7f863849853dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D32 4736 bytes
font_01_sfnt_off00006d5f.bin
b46cd0323cddebf7c51ce55a8f6cae3c8ea0a63c088ed47974f5cdc14622d10a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5F 10884 bytes

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