Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60c94d16aceba0e…

MALICIOUS

PDF

40.4 KB Created: 2020-10-17 00:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2aa2b6236dba1ebaa6634044bd915cec SHA-1: 01eacab5cb14e79b96508ddf03815b96baa45136 SHA-256: b60c94d16aceba0e7b44d045e43f1ba72a93464b2ee29e511d715b61568df101
154 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.club/123?keyword=spotify+android+always+offline'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to 'cdn-cms.f-static.net'. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest a social engineering lure, likely aiming to trick users into clicking through to malicious infrastructure.

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.club/123?keyword=spotify+android+always+offline
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f8858f71d378.pdf
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f88a85dab1cf.pdf
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f8a0a3f3a3cd.pdf
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8726b8ade3a.pdf
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f870ef8845ca.pdf
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/dd74533ac903d.pdf
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/sutonolob-taniwov.pdf
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/tukuxuwutaxopaw.pdf
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/vagifemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/dead_eye_red_dead_redemption_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1709/2769/files/fate_grand_order_quartz_hack.pdf
    • https://cdn.shopify.com/s/files/1/0480/7108/2148/files/fojenarivepuwos.pdf
    • https://cdn.shopify.com/s/files/1/0483/5642/5879/files/python_check_if_key_in_dictionary_case_insensitive.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/95790824392.pdf
    • https://uploads.strikinglycdn.com/files/a8bd4c3f-2f0b-4da5-a378-46176ba66eaa/jedaralimifomix.pdf
    • https://uploads.strikinglycdn.com/files/67a6ff14-7242-4b4f-a960-cace27a0d8ac/rewudogorudakifisakefulok.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_off0000612a.bin
12ad863417ac2d77473ea5d8554bfb6c5789a6abd769c9481505e5cc8c0571a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 5332 bytes
font_01_sfnt_off00007368.bin
9bae5c67ffe3a6a9262de7dad5d09367dd08d2c885bdb716d1f9a1da75a9d715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 9808 bytes

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