Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb4f8fd4d2a2a6f…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 00:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10eb8c164bf21bfc38d0da33e5fe4866 SHA-1: 5ff25fc29e601728cb09f7be72c648b0baea15b3 SHA-256: 5bb4f8fd4d2a2a6f5b2d780f1ae5fada0e7d2d71a8c8a6c50c19cb7e360fec51
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=shooting+games++for+pc', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'shooting games for pc'. The presence of numerous external PDF links, including the malicious redirector, indicates an attempt to lead the user to potentially harmful content.

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/pify?keyword=shooting+games++for+pc
    • http://files.minnesotaenergyathletics.com/uploads/1/3/0/9/130969811/e0cb116.pdf
    • http://files.pulpanddeckle.com/uploads/1/3/2/6/132680922/659f672e0.pdf
    • http://files.karenjshaw.com/uploads/1/3/0/7/130776047/wijugunivuvuxe-retanizulaga.pdf
    • http://files.ccalliance.com/uploads/1/3/0/7/130739837/gidof.pdf
    • http://files.ikaruscoffee.co.nz/uploads/1/3/0/8/130813364/6313670.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2605/4306/files/92861396516.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/bofujinetaralepijina.pdf
    • https://cdn.shopify.com/s/files/1/0436/9242/5384/files/jazirelawazamiwurij.pdf
    • https://cdn.shopify.com/s/files/1/0435/4965/5203/files/77190783723.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/topexur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/3639103538.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/75028648882.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/45288066837.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_off00006263.bin
801e1670140e4a39d0f8587116664682c049b867ba81f8807f2df8fead18fe75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6263 5500 bytes
font_01_sfnt_off000074e4.bin
629d81ff2b9cc8903bdeb4a2d5ec2d56dd648bdaf92158c4d1612bdbb4f574bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 10172 bytes