Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e9a2d4eea7659c…

MALICIOUS

PDF

57.4 KB Created: 2020-10-25 08:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: e2083c273c86193447c51a9f31f21450 SHA-1: 8b3c53475ce3e502c6c4812426779978a1f8ece7 SHA-256: 41e9a2d4eea7659c5c78fb5786a33e802e0c53c733730c4a4d1ed5a1ee2aa90a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary link, 'https://ttraff.link/aws?keyword=brandon+sanderson+way+of+kings+pdf', is flagged as malicious and likely serves as a lure to a malicious site. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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://ttraff.link/aws?keyword=brandon+sanderson+way+of+kings+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f89db8f4e335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393631/normal_5f8fb784b4089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8cf11eb8a50.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/tamegevikijovigo.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://fudixiboronis.weebly.com/uploads/1/3/4/3/134322082/gitazip-sikapom-kilonegokirigex.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/67184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/sosutonakorarobesun.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/endorsement_letter_for_ojt.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/vabagixarulibemaxipuvoxak.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/gasefowixosevepedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5986/1912/files/40927801610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2192/5543/files/tristan_e_isolda_richard_wagner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/lakunemuzofusivekame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1016/5416/files/boxizum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8422/7772/files/better_for_towing_manual_or_automatic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3766/2103/files/cubase_9_torrent_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50c2d19-3055-4038-a29a-ba2e33a2b851/zanutozamev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4baf469d-e96d-4a2e-a27a-57cbca7f50e5/5798455608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f74b4dca-d4ec-44dd-b4e2-ede08b962009/moteluvek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bd227d-584c-4f5c-a6a9-9c7ef9baf2de/2792786917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bef2a62-00e2-411a-bcaa-68fa7e927179/terapia_manual_ortopedica.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_off00009d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9B 5484 bytes
SHA-256: 20c39defe4d5d1858c25350c80dbf358a7f047e6e508e0bab7b0689b7af09674
font_01_sfnt_off0000b07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB07D 11880 bytes
SHA-256: fd26e4d212d36657235aee9c8ec4a6868efc51cadb0feba15a590064987c204d

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