Malicious PDF — malware analysis report

Static analysis result for SHA-256 62943d916d2834de…

MALICIOUS

PDF

36.6 KB Created: 2020-08-02 07:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e3fa516953d01f6721b331234609391 SHA-1: 25dd5fccbae98dcf299d9afb0076a7deb1bc99e6 SHA-256: 62943d916d2834dea6363128ca45475b06a6043f764e4e6d243ba8e033351d4b
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or phishing campaign. The presence of a password-protected archive lure suggests an attempt to bypass security scanning by encrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=purple+haze+tab
    • http://files.valkariefineart.com/uploads/1/3/1/4/131452922/501271.pdf
    • http://files.fromscratchbaker.com/uploads/1/3/2/6/132682663/54c5b849e34f585.pdf
    • http://files.next-level-models.com/uploads/1/3/1/4/131437445/ab8f88e822c50.pdf
    • http://files.the-osg.org/uploads/1/3/1/4/131437308/mavunubusanezufi.pdf
    • http://files.truechurchfalsechurch.com/uploads/1/3/1/4/131453871/fomeso-nupotif-gesedoradijo-kuronuvelojawe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/hack_link_english.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/wososuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/56062088829.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigazisamakolomomabixefox.pdf
    • https://cdn.shopify.com/s/files/1/0432/2541/5843/files/jungle_vibe_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0430/7776/3226/files/gifapejese.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/43527087686.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/here_comes_the_brides_cast.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3335/files/74848646098.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wawufomujemozinabewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/vosuvovutevoviruzedu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/50202329298.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_off00004f53.bin
2ca4cb14d0cf403b440940f801060cd9717a8b9a44b306e28b26339b159798a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F53 4920 bytes
font_01_sfnt_off00006009.bin
4fd57f4fdc51e91c27fd079839c6e65510b80dd7c4ff3045eba8d13006cc9cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 11072 bytes

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