Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dc5b3d18bbead3…

MALICIOUS

PDF

48.4 KB Created: 2020-10-26 04:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9d08280beda58df6e2d2e8e391d6945d SHA-1: 7bbda2a56ee49d9cd2dc152310a9e0c0dddc57c3 SHA-256: 48dc5b3d18bbead3000a58b4ce94c891e03b04f286b285ee8e5ae7ac6b200c5f
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'gettraff.ru'. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure. The ML classifier also strongly indicated maliciousness.

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/strik?keyword=rc+aircraft+design+pdf In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/6612789.pdfIn PDF document text
    • https://rojumiladikeju.weebly.com/uploads/1/3/4/3/134315163/kiribepum_pupuk_nupotom_zurijar.pdfIn PDF document text
    • https://kirenokasanav.weebly.com/uploads/1/3/4/4/134445236/566a5.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/6a8bf003ade76.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/c45cd132-af7b-43b0-bc4e-c4cf45981bca/35433690988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf73f4b-6a28-464b-8ab5-d535156406ec/2005_toyota_corolla_fuel_pump_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9417bda5-789e-4d9b-a466-8985b394634a/kifabevemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e07778-55f5-4259-89fa-8e06e733acc5/sajivezalorigirubus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7372b213-d506-4441-b800-c5056dc30b76/79961184930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe32615c-9622-467b-b77e-7d3615389f36/vojulikawaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671481fa-f7ad-4da2-9942-ea6ab5347761/biwatoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a285cf8b-1f70-459d-a1fb-a30848fa3cef/wavamobawixudufojinedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac951c3d-6778-4b53-b7c7-a853cfafd313/53891374345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83056fa2-db93-43d7-9787-c4b7d82d6bd3/94064641882.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/19685656093.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/sonubeguromigarilifekuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/astell__kern_ak70_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0652/8152/files/22922569581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/0947/2188/files/dawuzapafira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9752/1047/files/concept_of_arete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4114/2968/files/nivizi.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_off00006f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8C 4976 bytes
SHA-256: 263b7afb8128c2fbfe2b79815aaa91eb6a8fc1b7da1ea957ddbbc7ecbbe37a90
font_01_sfnt_off00008085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8085 10468 bytes
SHA-256: b28cccc58ca63716707a9afb4807fb90839dbc44b965c3ae0951159335d47626
font_02_sfnt_off0000a45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA45A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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