Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3f26a42a654940…

MALICIOUS

PDF

50.9 KB Created: 2020-10-16 02:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dc7cdd735f1486712d20e98982006bb1 SHA-1: 1220d3a4bfe9c9eddd0bf1c356f1af36a2e1da9b SHA-256: 4d3f26a42a654940733733d1568ae04fb1b81c8e765a702ace1183f77dd34111
154 Risk Score

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 external PDF files, forming a link farm. One prominent URL, https://cctraff.ru/pify?keyword=how+to+repair+computer+power+supply+pdf, is identified as a malicious redirector. The document's content, though obfuscated, appears to be a lure related to computer repair, aiming to drive traffic to malicious infrastructure.

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/pify?keyword=how+to+repair+computer+power+supply+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f88be9f75333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f875b353f838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f88cb1c5672f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f8864ecbff9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f87fb37e9c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f88c6717d3c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8766c710348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f88c83ce7d4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f87316fa41f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f875adceb25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f873265886cb.pdfIn PDF document text
    • https://site-1045328.mozfiles.com/files/1045328/75101551643.pdfIn PDF document text
    • https://site-1039694.mozfiles.com/files/1039694/kowaxed.pdfIn PDF document text
    • https://site-1041860.mozfiles.com/files/1041860/xefulomegez.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/2039f4c5-ec25-4910-bc2d-9e9c9e5af828/77130825724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d13e1903-4fc8-4aa9-afb8-345f613498a2/8964054834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d54b5c4-c1b5-4afc-b9b3-b29db77dae38/57600711864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc95f60-e205-4f2d-aeaa-75fa8bcd5530/dufuxamufetinatodexavogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857c6423-8ef9-4f91-a0e3-b03116019d4b/67361885676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1194/7926/files/tabla_de_derivadas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8304/1430/files/73219416118.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
stream_003_off000074f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x74F4 5284 bytes
SHA-256: 38edb67e7e38fa2c58d62ab5899e73740efe1aca413c7251960db0c8d4344e8d
font_01_sfnt_off0000874c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874C 5456 bytes
SHA-256: 69c611fa966cdaf2d9d1232eb6ce8da0a877f31d8ed7b93b767d81f5b43dc9fa
font_02_sfnt_off000099d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D4 9916 bytes
SHA-256: 23fec32d5025191e4da006a5115e0bac95894af43d612ae1233be158d3254092

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