Malicious PDF — malware analysis report

Static analysis result for SHA-256 2118b0def3182a3a…

MALICIOUS

PDF

50.6 KB Created: 2020-10-16 04:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2eb2df8d2be23c66cd79186b8cf76230 SHA-1: 5785e90e95c110f65e8f3b49d5e340fba921cf06 SHA-256: 2118b0def3182a3ab5011fe7ec658cd8e8c416a598a12f9ca35b4965b77f1f1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a PDF SEO link farm. One of these links points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, suggesting a lure.

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/123?keyword=black+soldier+fly+larvae+farming+pdf In PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/bezudabani-jasuxavowo.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/xodenog-wezapojewaju.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/9232432.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/kuwuwox-rukeb-dijafiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f88fb54ab80a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f88c58bc51de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f88fcdd128c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f883a7ac55fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f8750e478e00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f8739bdd3604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f88c06b8ed7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eebcafa5-09c5-4ced-b59c-18fcc03f1430/zojiwikupafevago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0af0b71-b390-487d-bbcb-4916086f5ff8/relopodujada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d424132-786c-4f3b-8010-6782804344d3/51840903032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b72ab30-7f26-4050-bcc2-09c4d0ef4da8/56135382904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bebbab-33f8-4e63-9cd2-04c30b121ece/suvasuzokajowifugarobelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/dan_gartrell_five_finger_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1109/0850/files/ways_of_improving_memory.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_off000083e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E2 5748 bytes
SHA-256: d0817e68ec75df16105029a2203611440fa83d6c3c944b7100ac52d474b3cdd3
font_01_sfnt_off0000976c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976C 11092 bytes
SHA-256: 412c8ea7c2616997c79c3b551e2b8862bd4a63bba5b32379ab2bf96bb8fde954

Open this report in the interactive analyzer, or submit your own file for analysis.