Malicious PDF — malware analysis report

Static analysis result for SHA-256 5869f7fe633056c3…

MALICIOUS

PDF

65.1 KB Created: 2020-11-30 04:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b60d605d9639b9eaab02c3276abaf0d9 SHA-1: bfaa408103f76e9180fffe26c69b7345fa9ee147 SHA-256: 5869f7fe633056c371f49ccf25174f2a7b216c09505b23a833a063b83f9e0540
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to seemingly random PDF files, suggesting a link farm or SEO spam operation. The primary external URL, 'https://trafficel.ru/123?utm_term=altec+lansing+ada745+manual+pdf', is likely part of this scheme. While no scripts were explicitly extracted, the PDF structure and the heuristic 'PDF_SEO_LINK_FARM' indicate malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?utm_term=altec+lansing+ada745+manual+pdf PDF link annotation
    • https://zodaribidibukez.weebly.com/uploads/1/3/4/7/134716266/rabozexuvujepit.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/8446904.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/0e88ed56dc71.pdfIn PDF document text
    • https://vutojakapejir.weebly.com/uploads/1/3/4/8/134895653/3650461.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/7c29b10d-49c4-47fd-b268-24bc59503140/73722367194.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/71375440057.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/76000845332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c6c613-cd23-4f77-927e-896e7fbb7d70/74377619080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2de8c5-0513-497c-b908-7b8709114d10/vulur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa358f5-b85f-4998-958d-4b8a93751d2c/mebonurexexonivanisejowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea920ec-509b-4f0b-85b6-43cd07214220/46245793278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afefb9d2-2542-48c7-837a-dc08b2257362/magejitadawufurazefilute.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/51529901546.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/42952586893.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
font_00_sfnt_off0000b50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50F 2872 bytes
SHA-256: b4beee6bbfa24ec09476dba31d9370cfd2fb8debc6c4e6197cfce122ddba1381
font_01_sfnt_off0000bf32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF32 5660 bytes
SHA-256: aece2470b29d6365888afd0def124c3d818bd878ebb6a79555d1abc5cd1f105e
font_02_sfnt_off0000d283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD283 10240 bytes
SHA-256: 894b3f2a8f20b4a379de3783b2fab2e8eaf227b3a07dfbf86dc4b129f528f718

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