Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14f415f0c0e4397…

MALICIOUS

PDF

44.4 KB Created: 2020-10-26 10:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eaec5ab6206e2cbf4a1cf7e85c6eee94 SHA-1: 79312cbf6ef8ee18681ed6e61945b632efd5cb20 SHA-256: a14f415f0c0e439797a1495a70826ffc028d62b94798c41dada625aa834c93d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ggtraff.ru/aws?keyword=building+information+modelling+pdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links indicates a 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://ggtraff.ru/aws?keyword=building+information+modelling+pdf In PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/4d755064aa91582.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/6256c6c9760.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/6f45f6a.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/fd28989654d.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/063c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8bdd664f310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f8ddb9c34896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404983/normal_5f9377a7cdbb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5f8a2cffe7a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f8b57fe9b13a.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/a97bcdc7-d9be-4120-a3da-291a9acbcce9/10968265411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df83281b-3929-4e77-8918-3f452070939e/95456659854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30243b2a-3314-4846-a933-1f890848f116/peaceful_warrior_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5466/4342/files/73243709401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8171/5878/files/79109100991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8997/2385/files/kozelelotexasixutino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6717/1508/files/crepusculo_dos_idolos_baixar.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/vlookup_hlookup_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/oceans_hillsong_united_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9238/7013/files/7553576538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/ninja_school_online_hack_cho_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2951/0324/files/nowonojavokidupefanamevox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4663/3621/files/wwe_13_apk.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_off00006ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC9 5232 bytes
SHA-256: d1ceefe374fdb16e923cf3b0e4fa015558061315e368c6525160106cbb943261
font_01_sfnt_off0000807f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807F 10400 bytes
SHA-256: 2a36bdf5825b35027eecd0517751fa2ccecc9bd31738a5276903b879badebec5

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