Malicious PDF — malware analysis report

Static analysis result for SHA-256 af01940cc9080ef2…

MALICIOUS

PDF

44.0 KB Created: 2020-08-12 21:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 996d226a04587d996dd4c21f5bb1e81f SHA-1: 61f83eadeb0731fd75c8e334bd3402f4f55bc275 SHA-256: af01940cc9080ef2947d2b165ba643e6790c104c41e4627f4247b8a0457fa048
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, specifically pointing to 'https://ttraff.cc/pify?keyword=annuities+101+pdf'. This link is presented within the document body, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm intended to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=annuities+101+pdf
    • http://vosojud.wildoutsidersclub.com/uploads/1/3/1/4/131437736/telujema-jevugeriw-kuzufamik-xodiz.pdf
    • http://files.artmatterscommunitystudiogallery.com/uploads/1/3/1/1/131164152/vewafuj_jerepuf_giletadobul_tejop.pdf
    • http://files.ulientertains.com/uploads/1/3/1/6/131606118/258ea.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/registros_contables_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/tevapozegejibipojeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/zogabefofiramefowejogez.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/private_school_interview_questions_for_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/waterlogging_in_your_locality_observation.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/79738894343.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/gastritis_erosiva_cronica.pdf
    • https://cdn.shopify.com/s/files/1/0434/5616/8093/files/79247098234.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/nozonurizeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/stanford_brown_dallas.pdf
    • https://cdn.shopify.com/s/files/1/0436/1371/6643/files/8932509803.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_off0000640b.bin
e161f0a503677cd553c19cde4fcc91126fad9c4a13218e0f0e0732e39f2d5157
pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 4652 bytes
font_01_sfnt_off000073f0.bin
4d00c65195098d7ac4119c93e01147d7803311163752874242b2589133217650
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F0 9848 bytes
font_02_sfnt_off00009588.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9588 4324 bytes