Malicious PDF — malware analysis report

Static analysis result for SHA-256 4888cdfd5606a294…

MALICIOUS

PDF

44.7 KB Created: 2020-08-12 07:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7d5f8f6ad9721da5f8a6ec27b92b9b1 SHA-1: e6f9a9fc2fbd255d587ee93bba687c97f6e85e46 SHA-256: 4888cdfd5606a294b12f2e18a4629fe08d9d637ad8a266b9bf199b04f1937cf0
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a tourist map and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded link, likely for phishing or further malware delivery.

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=mapa+turistico+s%25C3%25A3o+miguel+a%25C3%25A7ores+pdf
    • http://files.bede-group.co.uk/uploads/1/3/0/9/130969428/jadikale.pdf
    • http://files.jamesmatthewwilson.com/uploads/1/3/1/6/131637057/d1e23bb.pdf
    • http://files.savingamericatoday.com/uploads/1/3/0/8/130874683/ditixejajuzodaf.pdf
    • http://fopuroxem.speakupsaveamerica.com/uploads/1/3/0/8/130814328/1684842.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/marine_biogeochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/76851742957.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1526/files/barewojikisa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/botulinum_neurotoxin_injection_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/22901347341.pdf
    • https://cdn.shopify.com/s/files/1/0433/6032/1691/files/21865283920.pdf
    • https://cdn.shopify.com/s/files/1/0437/3718/6458/files/business_english_grammar_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/lawusuzadodusilelorirediz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/html_canvas_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/juvaxinivabiwitodaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/xofenovubaloluvikese.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006252.bin
a3004968ec5068a9c82305a61d74a759649b93afca8e90578fb104dea8701e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 5980 bytes
font_01_sfnt_off000075ad.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75AD 1800 bytes
font_02_sfnt_off00007e3a.bin
222aecbadd4fe5a1e255ec946e0fca0120eb1c6b799ef7fdf50811fb283a6ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3A 12296 bytes

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