Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ade96b26897fba…

MALICIOUS

PDF

44.8 KB Created: 2020-08-31 06:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1096e08c55909088155fa6de6be70ea9 SHA-1: f50a1e5256260dfb57b70c2ec7983b58e52dee97 SHA-256: f0ade96b26897fbab4d84ece949ff688755aae6c38e4928fa0c0284a7dba302b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to "Step 7 microwin trial version" and the malicious URL, suggesting a lure for users seeking software. The PDF also hosts a large number of external links, many pointing to Shopify, likely for SEO manipulation to improve search engine ranking for the malicious lure.

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/wix?keyword=step+7+microwin+trial+version
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/97443009252.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/86458049977.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/free_embroidery_designs_s_pes.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/3734040922.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/52273544662.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/kabesuvutokukekevufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/applications_of_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0437/2824/0794/files/75942212197.pdf
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/43633089996.pdf
    • https://static.usrfiles.com/ugd/b8c837_f53a7745d4554776b9e0693b659158fc.pdf
    • https://static.usrfiles.com/ugd/6df952_f3e16714ae8a4e3e81ec9f3d41d8bf35.pdf
    • https://static.usrfiles.com/ugd/b8c837_2614918459544740915951193849d94d.pdf
    • https://static.usrfiles.com/ugd/b8c837_467f2dc5953d4a34aabb7284f47b995b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9d89722f75f483983a8e7d72e5640f8.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/nutavulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/list_of_countries_capitals_currencies_and_languages.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/marvel_movies_dubbed_in_tamil.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_off0000591d.bin
e15035be220deae11210f3274aa4d473838ead1ae6fcd667027b0e712da3da7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591D 5204 bytes
font_01_sfnt_off00006abf.bin
37dfe9ac087f493cc68a81360cb96df0e4dbcb99c76d8792640b88a7eec1c84b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 14144 bytes
font_02_sfnt_off0000966d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x966D 4324 bytes

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