Malicious PDF — malware analysis report

Static analysis result for SHA-256 4997158a6f95d610…

MALICIOUS

PDF

56.5 KB Created: 2020-08-05 08:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bea241f903afe4d9ce955b4a9f55999 SHA-1: f400eedd231b346502f4a4db0ac032a390f37aee SHA-256: 4997158a6f95d61020f96c0cb42cbcb5473f9befba9b35ac85ee9bbc668aad9f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=smok+alien+220w+tc+manual+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm SEO tactic to improve search engine visibility for the lure. The ML classifier also 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.cc/pify?keyword=smok+alien+220w+tc+manual+pdf
    • http://files.traditionalcopper.com/uploads/1/3/2/6/132681771/lonuvuvusononekerin.pdf
    • http://fubexo.guillermoguareschi.com/uploads/1/3/1/3/131380042/7388bb73.pdf
    • http://ridedatu.schaufinefarms.com/uploads/1/3/0/8/130874416/mizafevumizogunaje.pdf
    • http://rofekev.dominikaphoto.com/uploads/1/3/0/7/130738615/buvixivuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/popoduz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0434/5836/3544/files/sipuzevegexolivemijefe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/tasiwipak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/ritedijizeruxexurofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofelowuloluvazoriwonub.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/96375563944.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/gexagutiwet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7640/9751/files/38863924050.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6235/files/33951097663.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/afrikaans_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/37087190347.pdf
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/lopotiwizunoj.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/
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009087.bin
2c09a2c6f7bc7ca54439d9ad8f041148b7fdabfe0f92c9d510a23309f518bad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9087 5444 bytes
font_01_sfnt_off0000a307.bin
f64d8723230bcc8c92db02196f5137c62303f47e7d9726e823e3f1d713ee3e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA307 10364 bytes
font_02_sfnt_off0000c695.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC695 4324 bytes

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