Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ee348df8fb9467…

MALICIOUS

PDF

73.8 KB Created: 2020-08-21 19:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a50d1fbaa1af0dce1fd2ae9397ed92e0 SHA-1: 3effcdd2d15de0cd1f18f1ab3f44ed7c0d772395 SHA-256: 04ee348df8fb9467c2a4ef8338cf1e9d56421b2d1736f03248aa0374a2f2108d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning attempt to distribute 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.ru/pify?keyword=dental+trauma+guide+intrusive+luxation
    • http://files.piratessoftballclubwa.com/uploads/1/3/2/6/132681464/9b136b2a04.pdf
    • http://bobetawo.jasoncather.com/uploads/1/3/1/1/131163744/mafivulom.pdf
    • http://gotul.davidanguish.com/uploads/1/3/0/7/130739564/893396f51.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/jexedikedokekelezotigasav.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/61365024019.pdf
    • https://cdn.shopify.com/s/files/1/0445/8423/9268/files/tee_cardioversion_patient_information.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/tratamento_fisioterapeutico_para_alzheimer.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/45143567698.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/ladixukegugafitidasikijeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/lilugisebikaruxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8340/files/introducing_spring_framework_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4488/6945/files/cohen_s_guidelines_for_effect_size.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/93791739960.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/amature_meaning_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/61231300577.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/modawaki.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2981/files/49739684271.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/bovogotomonozabi.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_off0000e45a.bin
0c77e08c5a7e8ca93efc29197ce739202fb464bf76bcdb095875959dac4e5b77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE45A 5272 bytes
font_01_sfnt_off0000f637.bin
3b583a538aaa88f541875fc54cc8f9ff9527cce47f5e8bd3340a9bdf57ed36a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 10404 bytes

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