Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd3338c726620f9…

MALICIOUS

PDF

42.4 KB Created: 2020-11-01 02:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 902bf1f4da1dcf4aff3dc5c56fbeb095 SHA-1: 643d39d8535c1bade5b14096beb28571ab0cfeb4 SHA-256: ffd3338c726620f96160efcc9c8e13274c5ca837dcfcffe1c0ba83a6b40077d2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to domains associated with redirectors and SEO link farms. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ggtraff.ru' as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure. This suggests the primary goal is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?keyword=sam%2527s+choice+spiral+ham+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5f8c55b5935a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5f8a684554319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407064/normal_5f9b7d6e486fa.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/faveburinezigas_dadel.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/7120309.pdfIn PDF document text
    • https://xelokadidato.weebly.com/uploads/1/3/3/9/133986733/zojaput_jezowe_nefuna_levefope.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/faketirodujewotowur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5f9dffdc324fa.pdfIn PDF document text
    • https://zufakuka.weebly.com/uploads/1/3/4/3/134343409/wageberiveg-zapamawojuris.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f94ae53f2ddd.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/03069993f12a56a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9204/8549/files/causes_of_the_depression_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5587/3190/files/bloon_td_5_hacked_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/gowawiwebawopapes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/llela_nature_preserve.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/pazewidadazixawani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0553/6150/files/toriwidatekerone.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CA 5192 bytes
SHA-256: dbecfee943e3d70e8712da837975f5c1d4396c0dd0d8cbf11decb0ad1158ee7c
font_01_sfnt_off00006942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6942 10932 bytes
SHA-256: 1dccd99dee5f1bf68c11aac390f807066f7acb43060a96f2822cb2973724a12f
font_02_sfnt_off00008e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E69 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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