Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f0a271748c1e45…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 05:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43e043f8781358352adfec565d80a3e0 SHA-1: 62391929e9d1a99bd7d3d04d4521f7bfde4e690d SHA-256: 02f0a271748c1e454f8933f0fe7491af27bac71e8bf5340409c40de6cc22d161
154 Risk Score

Malware Insights

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

The PDF document is disguised as an operator's manual to trick users into clicking a link. This link, https://ttraff.cc/wix?keyword=kubota+b1750+operators+manual, leads to known malicious redirector infrastructure. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness.

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.cc/wix?keyword=kubota+b1750+operators+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cec570_e259c9e28b6a4582be30d757b70182ca.pdf
    • https://static.usrfiles.com/ugd/d3758e_9e0cfc62356c49e79b7c3548e981678b.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd212668f901423aa76b47aee390d3c3.pdf
    • https://static.usrfiles.com/ugd/73f3b0_a1a02c74d0054f42997ba5fedb6ab0b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4b728b8f34e4bc4b63c6ee87bb3e84a.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/28962474587.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/494643836.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/94045546978.pdf
    • https://cdn.shopify.com/s/files/1/0450/1897/2318/files/tamil_dubbed_telugu_movies_2018_isaimini.pdf
    • https://static.usrfiles.com/ugd/cc089a_2b6a117dfaa84731ba25146159a84977.pdf
    • https://static.usrfiles.com/ugd/493135_622be861f2fc4872818ded30a5c879b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_370d3142b2dd427b91091a4ecdfb54ec.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/mubelin.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/adverbs_of_quantity_in_french_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/pikozerewod.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/66135950252.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/zefududiw.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_off000063e7.bin
0d58ee4f332c3549e64cff49d24d676d0d349f6fb72c4b3d60b2207ff4cec8ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E7 5472 bytes
font_01_sfnt_off00007676.bin
67fb906af1e3df7ce7be0ce5cc8f55e16a7c6bab28b2068e8026d79a096e8a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 15056 bytes

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