Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe7cc2fe08a64e9…

MALICIOUS

PDF

36.2 KB Created: 2020-10-10 19:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d1771bc9f3a85fc946a7b8dca5f47587 SHA-1: 41869b2a47cf5213b47ba6ba82ee03c42d4f7269 SHA-256: 5fe7cc2fe08a64e9afa9e0950bb851403b6f00485b09064a49e8221f8c555f70
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to what appears to be a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting an attempt to lure users to malicious sites.

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://cctraff.ru/strik?keyword=itag+manuale+italiano In PDF document text
    • http://files.hsvsnycslay.org/uploads/1/3/1/6/131606733/ae8bb9.pdfIn PDF document text
    • http://files.fbarhorses.com/uploads/1/3/1/6/131636907/mitavawi_vegagosozov_baxidejibomafol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5470/6069/files/golf_cart_solenoid_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9895/5684/files/pink_bobby_mcgee_sessions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9946/6142/files/gitoduvil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5944/4382/files/fallout_4_game_show_gauntlet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2435/0375/files/virginia_dmv_registration_fees.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1725/7628/files/osrs_easy_clue_scroll.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5172/6501/files/uconn_dairy_bar_reopening.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9526/4932/files/capitol_theater_port_chester_seating_view.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/mewirodezuj.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E59 4668 bytes
SHA-256: 799fa88ef62b95b747b01ab114b50038a2aaff057fc284a1a6759785a1676152
font_01_sfnt_off00005e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E23 11488 bytes
SHA-256: 6310de50f9b68937d1578f65d681e503bb5de6814af0b9eac395e776b5bb5689

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