Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c7002b2d2e607a…

MALICIOUS

PDF

43.5 KB Created: 2020-09-02 00:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 317b651aab40f00ae1bb31da65854824 SHA-1: 898377f3be460aa917a8eca545ed0e1bb122716e SHA-256: f2c7002b2d2e607ac14b92e51d59f5f3e65c28da8b234e78007c8c867b9e79ea
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting it is the intended lure. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or malware distribution attempt.

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.cc/wix?keyword=beautiful+life+abominable+violin+sheet+music
    • https://static.usrfiles.com/ugd/a771bd_2e2fb1a82c2b4d3694f136e407904472.pdf
    • https://static.usrfiles.com/ugd/24853a_0a406c5a6157461aa4ddfd248529dd4a.pdf
    • https://static.usrfiles.com/ugd/957c7b_9b31c83f736745fa88272c0fa8ad3941.pdf
    • https://static.usrfiles.com/ugd/97368a_3172d89602514572bd2ab00b401b8978.pdf
    • https://static.usrfiles.com/ugd/aff7ca_7185b6d7969a46c98168ea809bbe10ab.pdf
    • https://static.usrfiles.com/ugd/6908d7_9aea3e5bbf954994826755668857057f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f7f7a0500fc45cfb2cc1eef268515cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb182faf500d43258938161b721e2c6e.pdf
    • https://static.usrfiles.com/ugd/805d2a_eb7eaa67acea426a8936c6c762254eff.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/8n_ford_tractor_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0469/4438/7233/files/telecharger_bein_sport_live_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/kebipin.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/sine_cosine_and_tangent_practice_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/ridasabavize.pdf
    • https://cdn.shopify.com/s/files/1/0437/1801/7175/files/penawafewigenesigixop.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_off00004f95.bin
4f8a039d3a9c39779cdba36d2d3dd4f7babbc634cb09d8a41c025a81dc640cc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F95 5156 bytes
font_01_sfnt_off00006102.bin
ce025f4d5d8221f93ec681f7fe54fe6caf6c34340fe49b2d41122df82884f096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 15004 bytes
font_02_sfnt_off0000908e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908E 4324 bytes

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