Malicious PDF — malware analysis report

Static analysis result for SHA-256 a008814893524fe3…

MALICIOUS

PDF

50.3 KB Created: 2020-08-19 16:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 004711ff42ff354538aa6b49109be929 SHA-1: 527063188d2e2809e04bcdaf80edb0a7c9d1de19 SHA-256: a008814893524fe3cd09c3cf4eb250adcc60b975c4cfa6aedce40571f10658b4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and references a 'syllabus pdf', indicating a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The primary malicious URL is 'https://ttraff.com/pify?keyword=cds+2019+syllabus+pdf'.

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=cds+2019+syllabus+pdf
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdf
    • http://neruli.schrockguide.net/uploads/1/3/1/4/131453780/luzorupagogipunimu.pdf
    • http://files.thehanoverclub.com/uploads/1/3/1/3/131380480/sofemorigex.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2728/files/79854904552.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/8509450699.pdf
    • https://cdn.shopify.com/s/files/1/0429/9833/3599/files/oster_toaster_oven_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/5169/1681/files/beechcraft_1900d_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/lumurekabukepidezuvopiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/pujewuxupan.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/cs5_master_collection_serial.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/50005733128.pdf
    • https://cdn.shopify.com/s/files/1/0437/9652/9314/files/97384448598.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007953.bin
8fa970d56a4d0bb077bd1ac0385b1fd0fe919236b1cda847f45ac26843741132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 5108 bytes
font_01_sfnt_off00008ab1.bin
ca1b9082d8e98e7b1c52fb84b5b491660ec6ac6b581a0590529ce1833d58b704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB1 10520 bytes
font_02_sfnt_off0000ae7a.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7A 4324 bytes

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