Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3299b7fbffd0ef…

MALICIOUS

PDF

43.7 KB Created: 2020-08-20 06:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 161016e09e8e6aa7c252016db22649cb SHA-1: 382e7202fcf7f523453e28bb81ac030d50ce138f SHA-256: 0b3299b7fbffd0efea167dedf0ec2fb6afa7a74db3277b1b369b247fce5213ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=kdigo+guidelines+for+iga+nephropathy'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which lead to benign Shopify domains but one points to a suspicious domain. The ML classifier strongly flags this PDF as malicious, suggesting an attempt to lure users 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.com/pify?keyword=kdigo+guidelines+for+iga+nephropathy
    • http://files.mx.autumntheodorephotography.com/uploads/1/3/0/9/130969012/wuxoxixem_zebini_xizejo_giwukeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/uses_of_butterfly_pea.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/17435354114.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/react_bootstrap_4_admin_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/4361/1036/files/2002_mercury_mountaineer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3363/files/difference_between_nationalism_and_patriotism.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/20259164015.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/troy_bilt_weed_eater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/army_football_uniforms_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/5682/3462/files/xofakoribateduxibab.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/28938262701.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0956/files/dovuvob.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/14136295435.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/neat_nm-_1000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/susadivodamuzuwo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068e3.bin
229249057471ed4420b9edb2257ce89f7ca0562182226a16d9787a275b10bba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E3 5376 bytes
font_01_sfnt_off00007b34.bin
bfa22cf99f0b74d051e3bb9c4fe8e55e3e49732cac36c3a15ee892d0546470c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B34 12188 bytes

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