Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e65af7561f30046…

MALICIOUS

PDF

39.7 KB Created: 2020-09-01 01:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a939f393cf4d23fbf5c01e2c2b3a4ed SHA-1: e43cfa990565dae1cf3230f02d5c777313b02b9a SHA-256: 7e65af7561f30046cab1f501eea12072528bfe8567e5c852a358127bf42aaf9e
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=pxg+fishing+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a phishing or malware distribution site. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt, common in malicious document campaigns.

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=pxg+fishing+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/67e251_3f50756b545e4e00878d92efb415e007.pdf
    • https://static.usrfiles.com/ugd/784815_d96615f9c4524e55bdca51f23a39513c.pdf
    • https://static.usrfiles.com/ugd/a31856_c742dfd6af5040978431bb43a0fee74c.pdf
    • https://static.usrfiles.com/ugd/b47706_9a6f3652b1d644e6af018943b00ab2dd.pdf
    • https://static.usrfiles.com/ugd/cd79e3_510b72ff406e433c91462e002f2b22e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bc0d0d172014da7ab1951e5b53d763d.pdf
    • https://static.usrfiles.com/ugd/b8c837_17376b6bd9934ff083e0f0db4aa49056.pdf
    • https://static.usrfiles.com/ugd/b52961_4df129c2627649f3bdf87697a928bc5d.pdf
    • https://static.usrfiles.com/ugd/5bb01c_29e4c71801eb4454bda03a6014c24a86.pdf
    • https://static.usrfiles.com/ugd/b8c837_5be4f193f219455d8047db8ff99135ce.pdf
    • https://static.usrfiles.com/ugd/8d57bd_281fabfa586141d49ab0f4b7f7bd413e.pdf
    • https://static.usrfiles.com/ugd/b48b60_8b1c45e16a2d44508d94a60ac4eb232c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bddf7b4514c247c1be2646bd05302187.pdf
    • https://static.usrfiles.com/ugd/33ab24_3bc566889c5741b682bbc9acb1bbddb7.pdf
    • https://static.usrfiles.com/ugd/e32576_347305f2e9db44748d1c41bb5ad8083f.pdf
    • https://static.usrfiles.com/ugd/5bb01c_cbd40f7ab8aa4c66ba436a3736c30b12.pdf
    • https://static.usrfiles.com/ugd/5b9a87_ef4a2d813dd94c33b9c5a5a20dd2545c.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_off00005ea7.bin
1142e7786976b9368af0f3e16dd63a2afcf4f0b334520b0c695daaf6793e9e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA7 4900 bytes
font_01_sfnt_off00006f6a.bin
e6532a566ceb976bd2503a5e261276a14c0e9f114415723d456d5d2005e758e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6A 10152 bytes

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