Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a472482b886ae03…

MALICIOUS

PDF

43.9 KB Created: 2020-08-23 01:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a6c624fdf219c72f58995528f952d13 SHA-1: 961abf9c1ddd5b86307bc92dd216a3e28efef3e8 SHA-256: 6a472482b886ae03921e66d3ac4c79cc1079d9cbd3cd4e2bb0db503e7d8e98db
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=iowa+biennial+report+due+date', suggesting a lure to a malicious site. The presence of embedded URLs and the ML classifier's high confidence further support a malicious classification.

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=iowa+biennial+report+due+date
    • http://fumagufi.lockehavenfarm.com/uploads/1/3/1/8/131871433/6564471.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/lp_asidosis_metabolik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/six_pack_shortcuts.pdf
    • https://cdn.shopify.com/s/files/1/0464/9854/5822/files/az-_301_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/xoneneka.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0728/files/steam_client_bootstrapper.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/43556578773.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/xiwiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/free_icons_library.pdf
    • https://cdn.shopify.com/s/files/1/0433/6428/6618/files/ces_information_technology_hyderabad.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/tugow.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/formation_sur_les_automates_programmables_schneider.pdf
    • https://cdn.shopify.com/s/files/1/0446/1451/6899/files/cvent_university_certification_exam_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006213.bin
f1d9eabe2672f21688449a3f46de8d4b92743eb53027af17bdaae010b7098586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6213 4828 bytes
font_01_sfnt_off00007285.bin
d430636d1267e7ef383ef97632a65444cbcca8ceecd177cffb172144781efaea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7285 10020 bytes
font_02_sfnt_off000094e5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E5 4324 bytes

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