Malicious PDF — malware analysis report

Static analysis result for SHA-256 196f26d903d9c095…

MALICIOUS

PDF

43.7 KB Created: 2020-08-03 22:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 557688d5b724b1ff99ec981f333ec2a0 SHA-1: c4ee03dbb3f428f01f148ceec42ecf6507935015 SHA-256: 196f26d903d9c09511f0df9fb0e2b9a7ef4f3d9defe104ca5cef0c70a420b622
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a redirector service, which in turn points to a link farm of other PDFs. The primary malicious link is to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Ejercicios cardio en casa pdf' and the URL 'https://ttraff.com/pify?keyword=ejercicios+cardio+en+casa+pdf', suggesting a lure to disguise malicious redirection. 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.com/pify?keyword=ejercicios+cardio+en+casa+pdf
    • http://files.juneauobgyn.com/uploads/1/3/1/0/131070712/4322281.pdf
    • http://files.oakridgefootballbooster.com/uploads/1/3/1/8/131856134/kowiwel-sixiti-ximekamugoresev.pdf
    • http://files.khemkhon.com/uploads/1/3/1/0/131070618/junogilaril.pdf
    • http://files.kimberlyandersonritchie.com/uploads/1/3/1/1/131164112/fasiribinipalopam.pdf
    • http://files.arizonadpsrp.org/uploads/1/3/1/4/131453370/ximonotazim-pabarokukux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/tazijotejun.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/6070982366.pdf
    • https://cdn.shopify.com/s/files/1/0436/7941/6473/files/imgur_nsfw_clickable_you_re_welcome.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/todulesifopok.pdf
    • https://cdn.shopify.com/s/files/1/0434/2687/3509/files/dsp_addressing_modes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9557/files/kazidokugutobimovasepoki.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/anatomy_for_sculptors_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/andres_segovia_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/mareluxifenoliramekemoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8173/files/fundamentos_de_administrao_pblica_brasileira.pdf
    • https://cdn.shopify.com/s/files/1/0432/6693/2902/files/75421124615.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/69114551064.pdf
    • https://cdn.shopify.com/s/files/1/0438/9984/6824/files/7042228581.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/xegosotivibisabegibolu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b46.bin
f06bb24b3321bffe799275928f698cbda9b14de8cfb40884039bb155d846367a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B46 5152 bytes
font_01_sfnt_off00007ce5.bin
22ded94f91e11b20463728a50e2b8c5ceb82004f45d903521f043db2e95895bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE5 11424 bytes

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