Malicious PDF — malware analysis report

Static analysis result for SHA-256 686bca428560ac5d…

MALICIOUS

PDF

47.6 KB Created: 2020-08-04 07:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ae95265703c79d5c11f198373a0faf1 SHA-1: 0d22a8655218e9c06c221cbf036282554836550b SHA-256: 686bca428560ac5d60ab9242f48e994d8408bbc6230f0f4f604429f21f411d9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body and heuristics indicate a link farm strategy, where numerous links are provided, many pointing to benign Shopify domains, but one critical link leads to the malicious redirector. This suggests an attempt to disguise malicious activity within a large number of seemingly legitimate links.

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=vineland+adaptive+behavior+scales+2nd+edition+pdf
    • http://files.chelseafamilyfitness.com/uploads/1/3/0/7/130775806/gifav.pdf
    • http://files.management-star-class.com/uploads/1/3/1/4/131453198/b879ac6ab4f9.pdf
    • http://files.wanderwellfitness.com/uploads/1/3/1/3/131378943/9887214.pdf
    • http://files.matchmypartytheme.com/uploads/1/3/1/1/131163736/3178404.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/35510743869.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/27464170729.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/rijox.pdf
    • https://cdn.shopify.com/s/files/1/0439/8202/8958/files/ziruxafufufunoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/kutejona.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/zepugiratixizut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/xonelugega.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/58209211587.pdf
    • https://cdn.shopify.com/s/files/1/0432/7987/6252/files/23637203803.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/cabotage_laws_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/41286633605.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_off00006a8e.bin
8c3de852e41c007eaa0ad621d1dba4a59191f28f8d52900c219ab8474f379890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8E 5328 bytes
font_01_sfnt_off00007c9b.bin
9a03c7bf8f4584b35d9c3b75dfe02d707320917ea2e07a1c76ecda44ab7a81cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9B 11432 bytes
font_02_sfnt_off0000a26e.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA26E 4324 bytes

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