Malicious PDF — malware analysis report

Static analysis result for SHA-256 017d3fc4909f46f3…

MALICIOUS

PDF

47.2 KB Created: 2020-10-15 07:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 891efd90e65808c941519786009626e6 SHA-1: be2e975ce995c2d2253822bc1897d96a50977277 SHA-256: 017d3fc4909f46f388cf765dde43a608f92c7035194cf629d3f720803bd14745
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection attempt. One prominent URL, 'https://ttraff.ru/pify?keyword=revenge+of+the+nerds+3+parents+guide', is flagged as a malicious redirector. The document body, though partially obfuscated, also contains this URL and other links, reinforcing the malicious intent to redirect users. 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://ttraff.ru/pify?keyword=revenge+of+the+nerds+3+parents+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f87bcce421fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f87743e3810a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f874284522b4.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/6718811.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/pefogotibisu_todarurako.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/kegig.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/259b7f691396.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/3373854.pdfIn PDF document text
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/dumepa-vomunedojaxov-nofeza.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xereromejiv-koxozirusoror-moxonujis.pdfIn PDF document text
    • https://nasinapalu.weebly.com/uploads/1/3/0/7/130739684/6025596.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/solunopopevuve.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/1/0482/9007/0689/files/nueva_tabla_periodica_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8575/0966/files/jujafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0723/2158/files/macbeth_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/werogenufafowanabep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6948/0866/files/bikusadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/2588/4323/files/skywalker_trampoline_assembly_rectangle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/magic_duels_booster_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/legoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9915/9211/files/omron_pedometer_instruction_manual_hj-321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7835/6644/files/43389281934.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_off00006c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 5504 bytes
SHA-256: 1abd2b5380d7111deae13c18a2596902bbec4f20b1cdc52f183fb1e2bf30238a
font_01_sfnt_off00007f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F34 14756 bytes
SHA-256: 4b2623b8ce214821ca37b7530fa2274bebbfdf41b6655d30b7d4fb6ccc14d987

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