Malicious PDF — malware analysis report

Static analysis result for SHA-256 b570254c2f2b5a3d…

MALICIOUS

PDF

49.3 KB Created: 2020-08-04 23:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce88a44d4da893353ad7a503d616860f SHA-1: 3ef70a8bc704b1d90b620655dbf40f72dc5e1d20 SHA-256: b570254c2f2b5a3d582b8347b621aa7a2e18a3d1bae0e516f02f533ee4630b69
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same redirect URL, suggesting a lure for users to download or access content. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, likely to improve search engine ranking for malicious content.

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=azamgarh+map+pdf+download
    • http://files.ourladyqueenofpeace.org/uploads/1/3/2/6/132681479/sixifonemaxabig.pdf
    • http://files.liacuu.org/uploads/1/3/1/3/131398140/fifavatuduxikenoraj.pdf
    • http://files.realisticwingtutorial.com/uploads/1/3/1/4/131437319/9328854.pdf
    • http://tagol.asmorangecoast.com/uploads/1/3/1/8/131858685/378cb41e1d1cb1e.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/21928447602.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/vogap.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/9541434037.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1175/files/let_s_be_cops_2.pdf
    • https://cdn.shopify.com/s/files/1/0438/0029/7633/files/ranging_guild_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/roxamot.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8318/files/mini_lathe_projects.pdf
    • https://cdn.shopify.com/s/files/1/0440/4215/8245/files/zatazegulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/soxatedotexasepepuxutidum.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/87033029494.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/15934691413.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4843/files/52282393813.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/mevaxokezu.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006843.bin
be6dcaae39938f9009e10455e33b7822814cd2971d3252e1f111ae1a1db99ffa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6843 4952 bytes
font_01_sfnt_off000078fb.bin
7bd5e631ab938858507395085d15bca0d18699cce6b9e4ff005f4604f19ad98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FB 15832 bytes
font_02_sfnt_off0000a9d3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9D3 4324 bytes

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