Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01f6a0f8e2139b5…

MALICIOUS

PDF

42.4 KB Created: 2020-10-25 15:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b634bd9b9b89aae0d043975303c304a8 SHA-1: 8702f4411805f259df91d08ce8f9098567163fa0 SHA-256: e01f6a0f8e2139b50cc0cb604fc298455777076c54d1b997ccb63bc2b1047f78
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic identifying it as a redirector link to 'https://gettraff.ru/strik?keyword=mercruiser+service+manual+17+pdf'. The document body, though heavily obfuscated, contains references to 'mercruiser service manual 17 pdf', suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be directing users to a malicious URL.

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=mercruiser+service+manual+17+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f8b44dfbd6c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_5f923c9f63569.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/6652969.pdfIn PDF document text
    • https://dikoriwapajok.weebly.com/uploads/1/3/4/4/134447187/d40c9.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/gedeba.pdfIn PDF document text
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/nelajogaja.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/1/0502/3881/6456/files/simple_present_tense_worksheet_grade_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/5540/8071/files/57919226694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/cancer_de_ovario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f8efa8-cffa-43be-a95f-e6869256301c/32785756719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06520e7-5760-462d-bc05-ceec71f14f83/les_types_de_viandes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef5a788-d486-4ee2-94da-20e0a3a85963/64992591528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0ba882-1b7e-4c9f-9ff3-6444de0b6ab8/87157204512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c240cfc-0c61-457f-9372-b1510db3f4f1/vozonunipipowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e13ab89e-a428-457e-becb-0a7f8bce2b46/2711381633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7208/5926/files/77388678971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8974/8902/files/misuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/experimental_variables_worksheet_pogil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6153/7689/files/convert_file_to_ms_word_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1214/4283/files/zikalotokafokowijowukume.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_off00006638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 5500 bytes
SHA-256: d8b60631063e6418354bf31012c655463341a90afe8d8ee8bf8a1d4a58087f03
font_01_sfnt_off000078f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F0 10448 bytes
SHA-256: 3a8b6f5c9b6badc8f578b810f29b0c1994c18c3dbac8695b7c6f13e1c9f674fd

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