Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9307e1c4f57926…

MALICIOUS

PDF

44.7 KB Created: 2020-11-02 04:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2a670994de304c89681f047591b9cda9 SHA-1: 1459ad236192a1f4809aefbb9af3ffb8d7cf4f60 SHA-256: 4c9307e1c4f579264dcfc756660911fdb340c7c03aa0920560e4f8001a0a99d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is likely part of a link farm or SEO manipulation scheme, designed to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=micro+jig+-+zeroplay+guide+bar+system In PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/6182670.pdfIn PDF document text
    • https://duririsi.weebly.com/uploads/1/3/4/0/134096382/gaxafivediv-bunupajabuxazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/58458bf4-d2e5-4cb7-8787-90ed43dc972c/mososujifufowokejojunimes.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/gilumiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd11c0b-722e-410c-95c4-eb84f69fd4af/kofugemawisunositonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5880ff8c-dc02-4034-bbec-45ecfd8760cb/28602370504.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/ansoff_matrix_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/mathematical_induction_problems_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ec2ed9-e262-47bc-b65d-672340563d1c/dabodidetax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20a810c-ce79-4724-93ee-165089e05483/18584079887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37107eea-17ce-46e2-8e9f-81691751ab85/darkest_dungeon_trinkets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/75116760087.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/best_reader_for_android_without_ads.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_off00005ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED6 5576 bytes
SHA-256: bcfea9f38cfef8dd29703bf28d30dc244d257f64479be06a0dd59afdb2fc08f4
font_01_sfnt_off000071e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E3 11004 bytes
SHA-256: 03ad6d8df07506d4d4468fa6932d9de15155a4e48c47f6431fad5e46a19a56c0
font_02_sfnt_off000097b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B8 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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