Malicious PDF — malware analysis report

Static analysis result for SHA-256 296d8985f75dd928…

MALICIOUS

PDF

46.1 KB Created: 2020-10-29 00:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 58cb3ed25e9d37785811406dd4088744 SHA-1: 77385625dde7a799933e8953cd188fda6b664832 SHA-256: 296d8985f75dd92804b369dc2bfb9736d7d67c253f97424193bc63c57a035a39
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://gettraff.ru/aws?keyword=auvio+bluetooth+speaker+bts+300+manual', which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. The presence of a large number of external PDF links also indicates a potential link farm or SEO manipulation tactic.

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/aws?keyword=auvio+bluetooth+speaker+bts+300+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5f99ed72bf49f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8c99f140983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f93962954585.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/fbd0d315-7cc4-4018-972a-19a3faf797f9/tinalokamigif.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/pajulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54150fcd-1551-42aa-a1a5-50bf57008c5c/gitebilebinuwirividusube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9263/0427/files/95109914186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8202/9467/files/guitar_hero_aerosmith_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0614/2882/files/pink_flower_names_identification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ec5565-562a-4d63-b696-a68d2708354d/cestui_que_vie_act_1666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/59117429173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9462/0333/files/28501405911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5255/6184/files/makalah_pupuk_kompos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5070/4298/files/follow_my_leader_james_b_garfield.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/36937325521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efde6087-6911-4251-b9fa-c2b009524161/gerinimexadiwusal.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/single_channel_data_acquisition_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6119bb58-cf19-4756-a78c-8953c94b48da/18267009556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7931/7701/files/xanorodetobajarasovu.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_off000073ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AB 5620 bytes
SHA-256: ae3c800d7c289acb2be8387b4a39e94ba82b2e4ff3dc42fb09f53ceda2e39d55
font_01_sfnt_off00008696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8696 10772 bytes
SHA-256: f4fc8ab591f070d316ca8481e157c0da0dc84ebafca73cb7f5db5f7f116abc91

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