Malicious PDF — malware analysis report

Static analysis result for SHA-256 37faf79153ea7789…

MALICIOUS

PDF

39.4 KB Created: 2020-08-26 00:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3fc9fd3c6aec992d970787ecee8b155 SHA-1: d962504978a80073c726a63109529c26667a04ff SHA-256: 37faf79153ea77896c619dbcd924676516c133c3437746d5957e3800d1a1cadd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/pify?keyword=fundamentos+de+anestesia+regional+pd'. This link is likely intended to lead the user to a malicious site. The document also contains a PDF link farm heuristic, indicating it's designed to host numerous external links, further supporting the redirection attack pattern. The ML classifier also strongly flagged this PDF as malicious.

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.link/pify?keyword=fundamentos+de+anestesia+regional+pd
    • http://files.racqueteerstennisclub.net/uploads/1/3/1/4/131409158/vewalobilezij_fanenepu_lofokovixezuwi_rotejerixopotes.pdf
    • http://fovir.bhsautomotive.com/uploads/1/3/0/8/130813780/3059645.pdf
    • http://files.annalisalosangeles.com/uploads/1/3/1/3/131382841/tubiwur_meporeji_jiwimuwe_luzowazum.pdf
    • https://cdn.shopify.com/s/files/1/0461/8318/6585/files/fixemusajojimedopuvefuru.pdf
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/hershey_Schokolade-Torte_Rezept_einf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/lurudewapanu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0859/files/graco_nautilus_3_in_1_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/28202505111.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/jaxabupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/52690751154.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/25375213029.pdf
    • https://cdn.shopify.com/s/files/1/0428/8885/5718/files/30952112311.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/75710534886.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/40535153695.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_off00005b69.bin
486ffb0f916b22cbc1f215ba663cdee3803096516fabb8c91a6a0489a29b12a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B69 5236 bytes
font_01_sfnt_off00006d1e.bin
bd1b4a4b2884c7532a469140a1e14627d720742ed533c8d4f3982ede9d481b77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1E 10400 bytes

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