Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e58287c33b2470…

MALICIOUS

PDF

33.3 KB Created: 2020-09-04 12:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1e3a7887f3da4acc5d064691062b14a SHA-1: 1d149e4361baa3664c911972afcbacf9deb522e5 SHA-256: 55e58287c33b24701499ec2c2f2429b50bfd7267e4f255f3cb35e6e44e669059
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the URL that triggers this redirection. The presence of numerous other links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=economist+intelligence+unit+pakistan+country+report
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/nujusevomovajuwutasafa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/tale_of_two_wastelands_mod.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/cara_membuat_cv_menggunakan.pdf
    • https://cdn.shopify.com/s/files/1/0460/7957/4180/files/75175939620.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/61769616866.pdf
    • https://static.usrfiles.com/ugd/fe0276_858b59b4350a476198c25fc0d2c2bd56.pdf
    • https://static.usrfiles.com/ugd/4b68be_ed8d6c7766f44f4590bf6b4b64d70bce.pdf
    • https://static.usrfiles.com/ugd/a891c0_812eccc4e37749f290b214aca596c475.pdf
    • https://static.usrfiles.com/ugd/3615fb_992735efe3254834b0cb83a1d7925cb6.pdf
    • https://static.usrfiles.com/ugd/11baf9_5b2d4784c56646419dd22c5534345f17.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e0003f6df384570a96f39d9c6e2e33e.pdf
    • https://static.usrfiles.com/ugd/5360f8_1bd7a9eeb71b4ff4b8b40a8443c0fd76.pdf
    • https://cdn.shopify.com/s/files/1/0441/3338/4344/files/balearia_ibiza_formentera.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/cardinal_wiseman_greenford_school_uniform.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042f1.bin
366c9454e887b192a889af85898b4f5c711577aca1fad1cbdd313fba02b94802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42F1 5376 bytes
font_01_sfnt_off00005534.bin
7de20ec89128b07d1e2c569110be278e57a171d76324aec9a29168383b7a82c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5534 10152 bytes

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