Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb933448c298674…

MALICIOUS

PDF

45.4 KB Created: 2020-09-06 03:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ade0f61e869ea7c31ae3793af646294 SHA-1: cd69a233a5ce5a021161779ff3ebc7724773d401 SHA-256: 7fb933448c298674050ebb12e9e55e561f10092a7c3b5c34233214980a78a5a5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same URL and references a 'calendar template', suggesting a social engineering pretext. The ML classifier also strongly indicated 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.me/wix?keyword=calendar+template+2019-+20+school+year
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/de65f7_03e2ab8979aa4db296364c8e4aa2b9b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_687432d7fb5a4018b283f64ed50952c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_c180215a48c347af82da553412fb9ca4.pdf
    • https://static.usrfiles.com/ugd/234f58_bb0f9f337ab34bc084c50040b3937c4d.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/toshiba_dvr620ku_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3727/6825/files/fred_perry_footwear_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/coriolis_flow_meter_endress_hauser.pdf
    • https://cdn.shopify.com/s/files/1/0448/5667/2418/files/bubba_sparxxx_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/67878778383.pdf
    • https://cdn.shopify.com/s/files/1/0450/3139/1396/files/oral_anticoagulants.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9718/files/ginixapo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/xavezakasu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/causal_research_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/magix_vegas_pro_17_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/soxemanararukixuvebo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/nelufere.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_off000063f5.bin
40864d01f3d1d8572b3fb3287c88b73b83f515435b85a9cb304ca023c9860af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 5692 bytes
font_01_sfnt_off00007737.bin
7d2150a42e71aa1db2e97be03843ad8f13918afffa4688f113e03e21efacd053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7737 10328 bytes
font_02_sfnt_off00009a8a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8A 4324 bytes

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