Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ff3fab4746bf50…

MALICIOUS

PDF

76.4 KB Created: 2020-08-14 09:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e446b2687aaadd625b0c3e6f6aa9106 SHA-1: f251861cb5e2fc85b7c2943f03678199421d205f SHA-256: 86ff3fab4746bf50f7060cbaa697ef1874d67a21e9e9b2be13f036319942a362
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. The primary link, 'https://ttraff.ru/wb?keyword=introduction%20to%20protein%20structure%20prediction%20methods%20and%20algorithms%20pdf', is identified as a malicious redirector. This suggests the document is part of an SEO poisoning campaign designed to drive traffic to malicious infrastructure.

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.ru/wb?keyword=introduction%20to%20protein%20structure%20prediction%20methods%20and%20algorithms%20pdf
    • http://files.carchethealing.com/uploads/1/3/1/0/131070192/4819613.pdf
    • http://files.rashannaharmon.com/uploads/1/3/0/8/130873984/1807315.pdf
    • http://files.libertymerchandise.org/uploads/1/3/1/3/131383456/neronevigusifinevegu.pdf
    • http://dorulejak.barringtonmiddleschoolpto.com/uploads/1/3/1/3/131383297/vekimemusugame.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/7678856723.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/63666631132.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0047/files/towukoresekijopoko.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/rupoxinim.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/spoken_english_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/class_actinopterygii.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2276/files/awakening_the_giant_within_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/kulomuwuvijirepovinise.pdf
    • https://cdn.shopify.com/s/files/1/0436/0732/6882/files/gerolegudedotunene.pdf
    • https://cdn.shopify.com/s/files/1/0430/5711/9386/files/84317203435.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/falubixaposimapasubuxeja.pdf
    • https://cdn.shopify.com/s/files/1/0439/3920/1192/files/tudime.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d81c.bin
522bdd44343ca4cdd8dc8ab061319df7ca88ce2c690ac9c4a60a71ec0af1ed98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD81C 5504 bytes
font_01_sfnt_off0000eaa7.bin
942f3305d98d7d7b76e0c9af5e14a706c0a7d93f890acbff7b2482687bee4de3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 10376 bytes
font_02_sfnt_off00010e44.bin
6ff35bbcdef839a823e086214e5d609f702bf6b4484614f6c4b824d32b7fcc76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 16204 bytes

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