Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec2073b1fba1a4c…

MALICIOUS

PDF

47.0 KB Created: 2020-08-18 21:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a27e3c93fef88cadabff7c714a5501b SHA-1: a1e570ee901ef4451200315a65c120aa14f8e786 SHA-256: 0ec2073b1fba1a4cf3f74a612e3b99dd72a7d4b93a04587ca8f9089f0e85f5ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, forming a link farm, with a critical heuristic identifying one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Air accident reports ireland' and a URL that is also present in the heuristics, suggesting a lure to external content. The presence of a malicious redirector indicates an attempt to lead the user to a harmful site.

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=air+accident+reports+ireland
    • http://files.usminiaturehorses.com/uploads/1/3/1/1/131164043/jixeremilet-pojevusozixuka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/beetlejuice_say_my_name_flute_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/2002_honda_civic_ex_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/pozafulalejoxajumuwibe.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/31568172341.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/27246531259.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1676/files/36472598466.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8703/files/mevifokigunezejexepafolet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3450/8455/files/an_introduction_to_game_theory_osborne.pdf
    • https://cdn.shopify.com/s/files/1/0437/5268/5717/files/german_a1_vocabulary_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/lixonozebowata.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_off00006659.bin
b65d5ba4f868579bd5e7ca2e2cfaf00d9ecdf88b9f0464729a98b39eea82130b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6659 4844 bytes
font_01_sfnt_off000076c0.bin
3cc10aed47d75b17dd0a9faef2b6ec238cc7d90710276601efc1c35c5af4b5dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C0 13308 bytes
font_02_sfnt_off0000a148.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA148 4324 bytes

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