Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d865d5d8af746f…

MALICIOUS

PDF

54.7 KB Created: 2020-10-14 23:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 210db29981bc6575f14be2a7b3f65eb3 SHA-1: f4fe47ed5192b9f27b297241606ae201952ed947 SHA-256: 85d865d5d8af746f10b92a4a6b77935a90f6aadc372cf2fd54ea5424f22f0b07
184 Risk Score

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://ttraff.link/pify?keyword=encyclopedia+judaica+pdf+vol+4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f87479961195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87197c68a49.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/pewakijefaru_lavikefoled_rinenebot_zipulom.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/7c2eb3c.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/77959.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/3427a6b4f2903.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://site-1044105.mozfiles.com/files/1044105/zabuzolexidigudike.pdfIn PDF document text
    • https://site-1044067.mozfiles.com/files/1044067/lizagunavuz.pdfIn PDF document text
    • https://site-1042446.mozfiles.com/files/1042446/memipejodeve.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/37183008807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f871a3610eb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f875655d248c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f870fece121a.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/tojajixubunigerus.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.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/1/0434/5289/1297/files/liregufuvidobuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8725/6480/files/black_men_and_public_space_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2937/3343/files/bomatafimox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2291/2157/files/pathfinder_channel_smite_build.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E4 5160 bytes
SHA-256: 2fb012cedf8ae944416d27d9c9eff12be926ff30bc28ba00a00e5882a9a3f952
font_01_sfnt_off0000a79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA79D 11052 bytes
SHA-256: 162138206040831332c2555746594ae349dcbc15bd1276d6b95e44ceb3dd127d

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