Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca97cd6374f81b2…

MALICIOUS

PDF

40.3 KB Created: 2020-10-31 06:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f1a485a7642818803643dab7a9ae847c SHA-1: b0dac8a28f1d97dd34e3a2847d9b0dc37364f5aa SHA-256: 9ca97cd6374f81b22571f2e97325b12899553f3864a4b2853858d3e175cec805
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 link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://gettraff.ru/pify?keyword=ivy+league+softball+standings+2020, which is flagged as a known malicious redirector. The document's structure and content suggest an attempt to disguise malicious activity as legitimate content.

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://gettraff.ru/pify?keyword=ivy+league+softball+standings+2020 In PDF document text
    • https://purigimotefejis.weebly.com/uploads/1/3/4/3/134308192/tituwine.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/ca1683013.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/1058020.pdfIn PDF document text
    • https://pipalilivo.weebly.com/uploads/1/3/4/3/134310902/lipikeraserut-nevusugil-jevosinudavefop-gewefubinurik.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/416ea5bee16a.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/959961.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/51966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5f8b04343b152.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4612/6247/files/sosijonubumumaxofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0191/3759/files/kovukazupokumamixapemuxud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6514/7033/files/nodasebavezixadirak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4121/0011/files/java_tutorial_in_bengali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9460b2f1-973e-481d-a29c-5acfb556a2d7/petujamulozike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d72bc793-8ed5-4da7-994f-db9d0537eb30/83423306608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4463/3259/files/vigunerotevev.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4760 5492 bytes
SHA-256: 23cc9651decdbb17c9dd81fb64f68a433c00aaa33f407f3363a324f5eb981673
font_01_sfnt_off00005a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A31 10200 bytes
SHA-256: 040029deb6c5b1372bdc81594158c97b3eece22774ab0cf9f9bcab07e57466cf
font_02_sfnt_off00007d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D65 16476 bytes
SHA-256: 08b1bcdc5cbe76297eaaf69230cff477153115c10b7a09d2b55bc261af1a28f0

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