Malicious PDF — malware analysis report

Static analysis result for SHA-256 108870084cc138c8…

MALICIOUS

PDF

49.4 KB Created: 2020-08-03 20:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10b754b4a03be36d7cb8fbe2ed84c808 SHA-1: 010788a263ea84473e14fd1c614c014018d6706d SHA-256: 108870084cc138c82469e52718359446d4e6c9e7ce915b540ec8c56263b2597a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct the user to a potentially harmful site. The presence of many Shopify links indicates a link farm strategy, likely to obscure the malicious destination.

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=bloom+s+taxonomy+domains+pdf
    • http://files.toccatamusic.nl/uploads/1/3/1/4/131437094/ruvudenagezoguwif.pdf
    • http://files.angelindy.com/uploads/1/3/2/6/132695546/e622ef991.pdf
    • http://files.limitedchocolate.com/uploads/1/3/0/7/130775698/1128482.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/fikuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/mugum.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/8768833132.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/gedivejebazimodexirujol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdf
    • https://cdn.shopify.com/s/files/1/0434/0137/9996/files/bezijobebomuxifigefuge.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/32429244310.pdf
    • https://cdn.shopify.com/s/files/1/0431/5466/9729/files/38831168639.pdf
    • https://cdn.shopify.com/s/files/1/0431/0050/4217/files/ximujolur.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0725/files/precalculus_with_limits_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/32205042391.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/vidojakugubo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2028/files/54770721214.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/wufopeguxesox.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_off00006c77.bin
7f0cbe3275c6701d5cf901e7f7179a26323e0a77d1ea2274e8c7a6ab2fbb5730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C77 5880 bytes
font_01_sfnt_off0000809c.bin
9d837f330d142610ae4ec67f13357b41f222775be8798ed88ddc5bf40e1a3698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809C 5308 bytes
font_02_sfnt_off000092b0.bin
329de6645c552fed5184f9732aba71557f2d75e68cc70dc0b59dbed5acae6cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B0 10376 bytes

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