Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7e7eb261f0de99…

MALICIOUS

PDF

37.0 KB Created: 2020-08-14 08:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b9b9b703cb6400c4f7987eb2844b2b SHA-1: 19285c0dc2addfbed4fa9d1ddc19d5125b7dcf69 SHA-256: 6e7e7eb261f0de991acb0d3b0b46808bb57ae096179e8fd864b0e852a7bdd67c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. The primary link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the initial URL and appears to be a lure for a manual, likely to trick users into clicking through the link farm. No scripts were extracted from this sample.

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=carpigiani%20191%20bar%20manual
    • http://fizusef.djs-essex.co.uk/uploads/1/3/2/6/132680869/pamirofiletom_wisoz_wobezixoji.pdf
    • http://files.northwoodsasc.com/uploads/1/3/1/4/131408738/gosezizabuvepiperi.pdf
    • http://files.alexwilsonpianist.com/uploads/1/3/2/7/132710722/latebep-jawababegiwolob-zasip-safejugo.pdf
    • http://files.papiotrigroup.com/uploads/1/3/1/4/131437423/vigipuditevise-tawoki-lorovinix.pdf
    • http://files.maxxseals.com/uploads/1/3/1/4/131409309/1a46ddda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/flames_of_war_blood_guts_and_glory.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/11961685404.pdf
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/zodigegesovibizud.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/61512776032.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/xivezozufalamapagite.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/dudibaduxidonof.pdf
    • https://cdn.shopify.com/s/files/1/0430/5161/4359/files/99073547977.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/88785051600.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/algebraic_geometry_gathmann.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8065/files/learn_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/xbox_360_games_iso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/english_placement_test.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_off00004769.bin
5feb53d77d1a765c219a7947896782137481c32e5d899ab282e5fbf4d0376228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4769 4904 bytes
font_01_sfnt_off000057ef.bin
9c660e463cde1980a98f87e03d22132610eda5a9c58633f87135a7a0fd6bd06e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57EF 9656 bytes
font_02_sfnt_off000078ed.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78ED 4324 bytes

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