Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada5cb96295a69d2…

MALICIOUS

PDF

55.7 KB Created: 2020-08-07 02:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea7c1f9928e6d19549daea12a2c72f52 SHA-1: 27e350264cb44d9377944acdd36f78a4480b7286 SHA-256: ada5cb96295a69d24a9d04a3d1fe81ba0bbbcd6aa03bb9e6778f82bfe20329d1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, many pointing to Shopify domains, which is indicative of a link farm or SEO poisoning attempt. The primary malicious URL, 'https://ttraff.com/pify?keyword=air+pollution+related+articles+pdf', is flagged as a malicious redirector. The document body text, though heavily obfuscated, contains this URL and other PDF links, suggesting the document's purpose is to drive traffic to malicious infrastructure. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=air+pollution+related+articles+pdf
    • http://files.ihc31.org/uploads/1/3/0/9/130969146/wegumafofib-gupufa-zaxuruvurufixe.pdf
    • http://files.daviddenson.net/uploads/1/3/1/4/131408854/zejoromamu.pdf
    • http://files.thetravellingnannyblog.com/uploads/1/3/0/7/130775108/misevalogakadakawe.pdf
    • http://files.vinnysblogbookcom.com/uploads/1/3/2/6/132680901/xevidi-siril-nagiwoneva-lusubarinobar.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/mufuwoxavonupejamif.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/1536464375.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/75141850718.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/tubakawaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4376/6950/files/81137984234.pdf
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/why_are_you_interested_in_programming.pdf
    • https://cdn.shopify.com/s/files/1/0433/0484/5465/files/83814704784.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/100_pure_love.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/fijodamobuwunafowuku.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/jenulukesesitajawonavof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/63021150086.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/41656582850.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_off00008d80.bin
67882629ba14ba6bf19047dbfddb17742a58f658c0463bbb0a8d766733971d71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D80 5020 bytes
font_01_sfnt_off00009e94.bin
0722aa3bbf261bd2a0f15e710492fcfabb6f0c9f17461763b39a9f9115b8f376		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E94 10820 bytes
font_02_sfnt_off0000c363.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC363 4324 bytes

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