Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce5e30fc95a477d…

MALICIOUS

PDF

42.7 KB Created: 2020-08-01 20:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d3163b4dc543559d5b49ecf6932dda6 SHA-1: 9103018190050705903de0ecb04cf18164634222 SHA-256: 6ce5e30fc95a477dfc195f986e263b53e7073da65ae004320dfdd7da3a596982
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm infrastructure designed to redirect users to malicious sites. The primary malicious link identified is https://ttraff.ru/pify?keyword=water+temp+san+diego, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL, suggesting an attempt to disguise malicious activity as search results or document downloads.

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/pify?keyword=water+temp+san+diego
    • http://files.askahealthcaretraveler.com/uploads/1/3/1/3/131398560/filixojevukavifebabo.pdf
    • http://files.printshope.com/uploads/1/3/0/9/130969600/2f2f5e3d7d69486.pdf
    • http://files.funkymonkeyofficial.com/uploads/1/3/0/7/130738719/4783049.pdf
    • http://files.eastmanbookshop.com/uploads/1/3/1/0/131070452/tisizelujutanen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/46289059408.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/fewemujubufifuxoritimem.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/pemawalunimozufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/63452139836.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/60640015456.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/7632567831.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/42424097307.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/nejazatelepototewunuka.pdf
    • https://cdn.shopify.com/s/files/1/0436/5081/0014/files/75988826308.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/49925867593.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/dusalilezodulewofi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/kuwotexididesuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/63967603956.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000675d.bin
c503de912e47029e1ed6c93bdec136d2acd5e3f583fd2f8d8d452482bc70f722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675D 5260 bytes
font_01_sfnt_off00007934.bin
bf07b8e1bd9bdbbef239fd3f2cf1de93b0b9f7bf81113f5d96801495612bea6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7934 10860 bytes

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