Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a4d76d5f4bb6f4…

MALICIOUS

PDF

44.9 KB Created: 2020-10-31 04:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d6d0bf591832aa99556f1274140abd00 SHA-1: 31c4d7aeca5fff400e586dc0e9ca11151b37cb22 SHA-256: e2a4d76d5f4bb6f4e2a35fb98bcd57a19850afec8c83e820d1190c0baa2ad14d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, 'https://gettraff.ru/123?keyword=brother+ls+1217+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to the 'Brother ls 1217 manual' and the malicious URL, suggesting a lure to a malicious site. 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/123?keyword=brother+ls+1217+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f8710727f7a8.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/73fa99ba-c85b-4af8-8fa5-993e48cb1e5e/21002681693.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/electronics_and_communication_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7994bdfb-cb1a-4d15-8c7a-e26c38b66990/gejedisotetugekiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e6ec6a-7c1a-46a1-9b1a-23025f78f318/black_eyed_peas_i_gotta_feeling_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/the_hunger_games_tribute_guide_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1680929-6298-4fe4-b367-18974ff70465/20538203001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae76aa46-5b14-4c03-896c-2bd92f55f875/fodat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e263f09-25a0-487f-a773-f9c5288e8933/93185330101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0760/6423/files/the_lost_book_of_enoch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29931ceb-9ac9-414c-b81d-7b55cbd35c67/benemologimukuwiguzabif.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_off00006149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 5072 bytes
SHA-256: d94530784e88ae3301f725671ad4f50875c1f71f1709cdef1d01bfa07c262e85
font_01_sfnt_off00007267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7267 11828 bytes
SHA-256: 89f4e3653d86e4205b896b4e4e8fa58f3061fe4b371d60cd233d27a6ed229af9
font_02_sfnt_off000098b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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