Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1cbc3ae3e3a851…

MALICIOUS

PDF

67.0 KB Created: 2020-10-17 14:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2bfec0bff2d55574c70b22b7209ae9c2 SHA-1: 64d7bb4e740b88da207790744d0b81ca75feae8a SHA-256: 2a1cbc3ae3e3a85124a15499c0b49f5b0b5c07063a71704659fe696bd510ff0b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector and others forming a link farm. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious infrastructure, likely for further exploitation or malware delivery.

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://cctraff.ru/123?keyword=rheumatoid+arthritis+treatment+guidelines+pdf In PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/3722862.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/8499582.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/d7dfa3bc38dcb.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/nogasun-vixupigi-danofu.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/e71d5b95e089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f8aadf6cfc66.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/resesemeni.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/fefumuduxogino.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/4846395.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/198c460007.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/1/0431/7590/3392/files/28815281102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/6140/1768/files/30177585787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0184/3359/files/wurukutis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/rest_api_design_rulebook_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9682/5764/files/tiwiluno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7961/2578/files/ideal_boilers_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8725/6480/files/timegimijeluterile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9089/4755/files/minecraft_end_credits_lyrics.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_off0000c5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F8 5464 bytes
SHA-256: 19b0f4d8d767836bc5d0f6c76a2c055449631ec5b4f4e0a79988830ee7c1dab3
font_01_sfnt_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 11452 bytes
SHA-256: e0461cb59c8b7f784d26a80ff0530840a6d0ce8acbed19855855bc16d3d966fd

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