Malicious PDF — malware analysis report

Static analysis result for SHA-256 84029a3ad2b1d26e…

MALICIOUS

PDF

43.5 KB Created: 2020-08-08 10:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 167be1dea93edf1a3008b2fc2c8812cd SHA-1: 5425262c0d5b033bd13d3bb1e57a4140e31fdcee SHA-256: 84029a3ad2b1d26ece4e5f96ca5a0627c0c37b25d614718c55865ca3b1628216
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious link identified is https://ttraff.com/pify?keyword=anatomia+del+cerebro+humano+y+sus+funciones.+pdf, which is flagged as malicious. The document's structure suggests it is part of a link farm designed to drive traffic to potentially harmful sites.

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=anatomia+del+cerebro+humano+y+sus+funciones.+pdf
    • http://files.anthonyandrose.com/uploads/1/3/1/3/131379696/berikavejevokov.pdf
    • http://files.mauirunning.com/uploads/1/3/0/9/130969472/kifasuz.pdf
    • http://files.theredpillrenegade.com/uploads/1/3/0/9/130969297/kuxamopuruwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/wizejajovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/nenikiwawewita.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/99506138758.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/exploring_psychology_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/7272524765.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/11271439774.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/presentation_skills_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/89496917922.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/jivabenifudoxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/vufulijofezisita.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/xuxivupadolivosizir.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/51839878517.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_off00006887.bin
55d75967d4e6299eea185549954982f403cc7e1f3ccf50f9e9eb3f32e0b540bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 5656 bytes
font_01_sfnt_off00007ba4.bin
efb4c4822fa92899cd92bfa6d41c56cdbf2f80041321b51a68ea19a2dfbe9ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA4 11108 bytes