Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29706b7659e35e0…

MALICIOUS

PDF

82.5 KB Created: 2020-11-02 02:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12e34d0cd7264b72d3ef908021f9d18a SHA-1: d7c0476fa02192872c3a8e884b4c8f12e8ef0a62 SHA-256: c29706b7659e35e088e80111a1d0f9b76ec0d0a47ae6cd8c1665a6f76dc1f7e3
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains embedded URLs, one of which is flagged as a malicious redirector. The heuristic 'SE_CALLBACK_LURE' indicates the document's content is designed to trick users into calling a phone number, consistent with callback phishing or tech-support scams. The presence of numerous external PDF links, some pointing to potentially benign Shopify domains, suggests a link farm or SEO manipulation tactic, possibly to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?keyword=727-868-3471%253D-3612+is+true
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f9b1c34439d5.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/74cef76d27b2ad.pdf
    • https://cdn-cms.f-static.net/uploads/4406482/normal_5f979c3abcace.pdf
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/bfe8426fb8ea8.pdf
    • https://fafemuwupid.weebly.com/uploads/1/3/4/3/134368635/7310962.pdf
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/a3b553f00eef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0504/5787/0490/files/illusion_wizard_5e_build.pdf
    • https://cdn.shopify.com/s/files/1/0428/4373/4182/files/34695769187.pdf
    • https://cdn.shopify.com/s/files/1/0507/7555/6290/files/7884999481.pdf
    • https://uploads.strikinglycdn.com/files/35ff4de0-41cb-4bd3-bc8b-d3f9e64fe61e/36835921145.pdf
    • https://cdn.shopify.com/s/files/1/0438/2425/1042/files/thoughts_and_notions_book_free_download.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b616.bin
e548a5afb62b427ff17cb6ba683ab3d0138bb9f131a154362665ef5a87d4a93e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB616 24300 bytes
font_01_sfnt_off0001015d.bin
625289a32b4fca444e975556faaa51229a3e4079e1795cfcde79406ed120d84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 5284 bytes
font_02_sfnt_off00011386.bin
0f3a1993f1d3d8a754293db5e327d04674076f6feebcf2478ea94943f0dedd04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11386 12488 bytes

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