Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce7096b284443ec…

MALICIOUS

PDF

33.0 KB Created: 2020-08-17 18:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbb2bf4dbc9d9a22dc413d59b9d9e3b8 SHA-1: 73e91c5a698f41ec97ea9ef8b198a022fc169ec5 SHA-256: 7ce7096b284443ec35bc81c8bafc2113500f5bc0ac6a44b9bdaece3d2f6cf0fd
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. Another critical heuristic identified it as a PDF link farm, suggesting a potential SEO manipulation or traffic redirection scheme. While no scripts were extracted, the sheer volume of links and the malicious redirector link strongly suggest a malicious intent, likely to drive traffic to malicious sites or distribute further malware. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=ascom+i62+guide
    • http://files.tomdangofficial.com/uploads/1/3/1/0/131070367/df4530bcd5c0a2f.pdf
    • http://files.thesugarqueen.net/uploads/1/3/1/3/131379256/dupuzememuguj_dexaxubux_nabipima.pdf
    • http://files.swazisafe.org/uploads/1/3/0/9/130969172/pogifuduxefex-vefuvilulitapog.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/cbc_test_results.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8872/files/administrao_de_produo_e_operaes.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/woxojujibufuvilase.pdf
    • https://cdn.shopify.com/s/files/1/0452/1410/5760/files/61009946372.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/bewaremosulewipowekuzadiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0438/7750/files/16104250877.pdf
    • https://cdn.shopify.com/s/files/1/0438/8087/4139/files/vogaku.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/android_messages_for_web_not_showing_up.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/blush_faces_of_shame.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/mirupisadasadipotujudiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1880/files/myers_briggs_personality_type_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/download_novel_hunger_games_bahasa_indonesia.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_off00004560.bin
a26c60f173c7e46f7ce7a16bfc893fd9f9c173d28e61ef57a7a02ae211b7698e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4560 5196 bytes
font_01_sfnt_off000056f5.bin
bb58dec05db5589cdffa7897ae579828e310e07735f5911ab608406e2a507a7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F5 9640 bytes

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