Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eac685f260d1784…

MALICIOUS

PDF

58.2 KB Created: 2020-08-10 11:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b89479793ed41ecb72a6bdd25bf9f52 SHA-1: 2673bde9e6aab6469f78d6aac34d33ed43f26bbb SHA-256: 5eac685f260d17841e3954a4f03691818f2695c437f17aeb6384b77412805510
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, indicating an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same malicious URL and a list of other URLs, likely part of a link farm designed to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=camille+saint+saens+danse+macabre+pdf
    • http://files.greenwolfverticalfarm.com/uploads/1/3/1/3/131383719/3f0af7c6fe8.pdf
    • http://files.javoskigriffith.com/uploads/1/3/1/4/131437484/2029180.pdf
    • http://files.luminousmountain.com/uploads/1/3/0/9/130969717/pajum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/mazawike.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5733/2895/files/rakaxeji.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/52180695239.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/gifidefavuwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/kaluvijavusanamaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2958/4282/files/42515032768.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/educational_psychology_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9034/files/rasetekuzigafav.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/fojafuvolofugeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/11440544162.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007da0.bin
480da99a5bba4fb88ea7ca1ba1440db3a66643e64016aa3a2f51dfc6580303ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA0 5140 bytes
font_01_sfnt_off00008ef2.bin
a1e3a40a5a02c8b8133ad3f3068fc627c164f308b65e681a1be7f3b74a4e98d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF2 12688 bytes
font_02_sfnt_off0000b7f4.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F4 16120 bytes
font_03_sfnt_off0000ccdb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDB 4324 bytes

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