Malicious PDF — malware analysis report

Static analysis result for SHA-256 568e9e619c911772…

MALICIOUS

PDF

58.2 KB Created: 2020-10-30 05:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 935a578ea0274006cb3d535edaca187f SHA-1: 9d72293511d79df2246f3e89d3b1fd1024e3fea2 SHA-256: 568e9e619c9117725fe77c6ae1dd03e81d12743f4d16da12b2afcbbcd280a944
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. The primary URL, 'https://gettraff.ru/strik?keyword=kamasutra+book+free+pdf+download+in+hindi', is identified as a malicious redirector. This suggests the document is designed to funnel users to malicious sites under the guise of providing free PDF downloads, likely for phishing or malware distribution.

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://gettraff.ru/strik?keyword=kamasutra+book+free+pdf+download+in+hindi In PDF document text
    • https://rizulibix.weebly.com/uploads/1/3/4/3/134358491/26002b41.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/2504198.pdfIn PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/fekoriji-pomugogogijej-vegebamigudu.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/muwakavita_ginadiwigize_juzunakinu_ruxajetenujo.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/kalunasegove.pdfIn PDF document text
    • https://seforurusux.weebly.com/uploads/1/3/4/1/134131879/xikixolizo.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/7334041.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/lazekazatulemofun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_5f971a1228b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5f8f03553ff12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f8df09b3deb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0329/5736/6463/files/lactaid_fast_act_chewables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdf48c6-7903-4de5-a457-a4041b3ab193/jinerozi.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_off000089f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F2 5548 bytes
SHA-256: 7861c81ac4d4553daace266e43dd9a382771636ea21918ed4d6c4cfe8b5f94ea
font_01_sfnt_off00009caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAF 10784 bytes
SHA-256: d29e4d345668226194986758b95f249122985e68c10d50539414f9f8f02fd40c
font_02_sfnt_off0000c103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC103 7152 bytes
SHA-256: 4d2b0c60978d27a779ef91da8ca981bfbc62b353b57fdc3d936d4575acf12de9

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