Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7481dad0277351…

MALICIOUS

PDF

48.3 KB Created: 2020-08-18 16:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3175fcc99d0b2e71b8b6cd1dbe297208 SHA-1: aa2f0a467f4fcf43abb632df6210996487cee125 SHA-256: 0a7481dad02773513b1500a85a657b961339fd4ef635d0e1f6aea0cdcdbfcf9b
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a primary link pointing to 'ttraff.ru', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Citrix web wrapper' and the malicious URL, suggesting a lure to download potentially harmful content. The presence of many Shopify-hosted PDF links indicates a potential SEO link farm used to mask the malicious redirector.

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=citrix+web+wrapper.+msi
    • http://files.inspiredartexhibition.com/uploads/1/3/1/4/131437330/ruzulebekixonipis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/95608374205.pdf
    • https://cdn.shopify.com/s/files/1/0434/9408/0677/files/tufuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/articles_of_partnership_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/milady_theory_workbook_answers_chapter_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/68591749125.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/48133775694.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/67861632407.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/42959253787.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/dakowumabokesukonabevib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/39659490206.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/kupije.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/microeconomics_for_today_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pezudatilekubad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/59089641203.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_off00006905.bin
b113a780e7bd7cba4cdd27196ceb7adee4b29cd373fc42055a91c945fe598939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6905 4860 bytes
font_01_sfnt_off00007998.bin
c0105d128f296e2949d2730452302e709af95ce7278eb83838937148de9be701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7998 13852 bytes
font_02_sfnt_off0000a60e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA60E 4324 bytes

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