Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb5b5490cddba06…

MALICIOUS

PDF

35.9 KB Created: 2020-08-16 20:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ff682e030cf8e834a9fc0801bc0b9b5 SHA-1: f1a82f78f157b0683188358112774dceac83b6d6 SHA-256: 0eb5b5490cddba06cdf75f6750d07ea82ded981fab14692f2c4b07f203929566
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on Shopify and appear to be part of a link farm. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=toronto+star+tv+guide+listings, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to TV listings and includes the same redirector URL, suggesting a lure to encourage clicks. No scripts were extracted, but the presence of numerous links and the redirector indicates a phishing or redirection attack.

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.cc/pify?keyword=toronto+star+tv+guide+listings
    • http://sasixij.suttas.com/uploads/1/3/1/8/131871674/nejuzuralasud.pdf
    • http://files.butterflyposturalchair.com/uploads/1/3/1/1/131164176/ladev.pdf
    • http://wubew.susmanosextendidasmexico.com/uploads/1/3/1/0/131070374/puferotufifu.pdf
    • http://files.anviltraining.co.uk/uploads/1/3/1/4/131438563/b447d67f1580.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/tobozarajutomugijamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9321/files/bapadoligurijazorigijin.pdf
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/3908364414.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/41737468610.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/today_and_tomorrow_henry_ford.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/41027283387.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/best_video_caller_id_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/coleman_ac_unit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/shadowrun_hong_kong_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/vukama.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.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_off00004ee6.bin
59ea0842010ecfe8e9bd7540ed401430d52471a8403db9392ad768daed935b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE6 5000 bytes
font_01_sfnt_off00005ff9.bin
af2d5418ca737197ea7c10df94a8833b1523286c8518b3087eb633591f88a594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 10212 bytes

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