Malicious PDF — malware analysis report

Static analysis result for SHA-256 6581c55fa6ca065a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-28 00:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1571a189460627bf36bbb75d5bbf9d SHA-1: 3e1bd9bd83c3597b60442b783b2a3556b320024b SHA-256: 6581c55fa6ca065a1d9c4ed3731b82fdf45f08ace14a9903b6cd30f110d05e9b
154 Risk Score

Malware Insights

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

The PDF contains a link farm of 28 external PDF links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=new+galaxy+smoke+shop', which is flagged as malicious. This suggests the document is designed to redirect users to potentially harmful content, possibly for phishing or malware distribution.

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.com/pify?keyword=new+galaxy+smoke+shop
    • http://files.greekschoolonline.com/uploads/1/3/0/7/130776177/69d327fb.pdf
    • http://files.discoverygame.org/uploads/1/3/2/6/132695460/gudufalu_megonebo_zakupovijux.pdf
    • http://zidesul.gsugba.com/uploads/1/3/0/8/130874380/9009571.pdf
    • http://zuboxufuk.oileranimation.com/uploads/1/3/0/7/130738667/2696931.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/4576/4770/files/core_java_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/gewovutifolivubodowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/98267193818.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7616/files/32048256273.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/29939629785.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/apollo_vs_relay.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/refavojorobegogewuxutum.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1287/files/data_governance_framework_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/26907994297.pdf
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/nizirevufubo.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_off00005f6a.bin
3bf1a093d6e4a0e29a60288c36bf084a2ce119de4977e4ccfaf79eae8a6921e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6A 4988 bytes
font_01_sfnt_off00007086.bin
c927aabfddbfb2dadbef80500bc48f88109954acb3d3d04c611d982f73986a18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7086 10128 bytes
font_02_sfnt_off0000933b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x933B 4324 bytes

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