Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb24886dc4ecf13f…

MALICIOUS

PDF

106.6 KB Created: 2020-11-02 09:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bc6f53da97233c870b707d6f516a4c46 SHA-1: d9d8315df79d51034028258bb35d071e40c7f181 SHA-256: bb24886dc4ecf13f319a6c76d66350e114dab4315a4f96fce86fd47e481634b1
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=pokemon+go+london+cords In PDF document text
    • https://zazusixalug.weebly.com/uploads/1/3/4/4/134491239/7482284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418762/normal_5f9b04ba2322e.pdfIn PDF document text
    • https://naxupezo.weebly.com/uploads/1/3/4/3/134350891/1613985.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/1/0507/5428/9839/files/varovulikitobepixujuwuvim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2566/4666/files/think_twice_michael_mauboussin.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/dk_illustrated_oxford_dictionary_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4441/0806/files/lebiwodazanagasoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8222/8936/files/wajisuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8475/7147/files/naruto_x_boruto_ninja_voltage_hack_no_verification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/huntington_theatre_company_events.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/japamebokepu.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/jafisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b7690d-00af-4d66-a02c-697cd3b112f3/18496512809.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/fijaripiwedujetukodit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a686891-906d-4abd-8b2e-563f5a22f52c/bixivipuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4446/0951/files/74026312685.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/popefazawawipobud.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13541 4080 bytes
SHA-256: b38a5ea0e97393f977cb8949b3eba25610d18c8846ffa4756957c390098de070
font_01_sfnt_off000143a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A8 5116 bytes
SHA-256: a582b5843c6f3e4ecf441d733af63d6bfc98de91e3a4425bb7e1a5a137ed5782
font_02_sfnt_off00015502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15502 12100 bytes
SHA-256: f3ba222e1125f6816734773375b07f2f5dc3bdb39f43d5785c3ef47c49916c5e
font_03_sfnt_off00017d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D2A 9972 bytes
SHA-256: 88cd7d769da78fdf8745a56b0e92fc92e9e927ee4270b61dc2e19331b34fae03

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