Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b22f5a1191cbdc…

MALICIOUS

PDF

45.5 KB Created: 2020-10-26 09:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 659fa88ca6e7f864609ad3353112f4dd SHA-1: 7804a7f3e0101cc6af1a9ab42e447372e93ad321 SHA-256: 73b22f5a1191cbdc5374c149ad17ea093f277d63cb27b3b15ae8f6ee58a67ad0
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, which is likely intended to lead the user to a malicious site. The document body and embedded URLs suggest a link farm or SEO poisoning tactic, aiming to attract users searching for specific manuals. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.club/123?keyword=taranis+x9d+plus+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5f95807b4cc02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f873b0865b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5f961c3a9629e.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/5855783.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/wamonigoxanu_xoralafikisawiv_bigaruganeleg.pdfIn PDF document text
    • https://fixasamajiwige.weebly.com/uploads/1/3/4/3/134318971/6224729.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/bcb484995a4798.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://cdn.shopify.com/s/files/1/0503/4862/1987/files/95294314285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6867/7016/files/literal_equations_worksheet_hard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9680/5028/files/jemufuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/you_ve_been_booed_sign.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/81785948777.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/13346035903.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/92386601679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359a5877-8fa8-4904-bafe-71fa6dd8e64a/kivobegisejipaxokenufunuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e5007f9-402a-4852-8ecd-9180a47328b9/rolom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2c4ffd-7a1e-453e-8702-2d039906a97d/11520964761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4415/4791/files/chlorine_institute_pamphlet_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1415/9040/files/taylormade_r11_driver_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/ogt_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3965/1497/files/commas_with_quotation_marks_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4646/1852/files/anatomy_and_physiology_ch_1_study_guide.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_off00006736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6736 4852 bytes
SHA-256: 79952dbae0d2ee786e714d1485de2bebec0663448740ffb0eb1e098b32cfe22d
font_01_sfnt_off00007779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7779 10304 bytes
SHA-256: 1fd952be8907ed4acf64cba2f3434d8340137be95b7d46a3f662e4e67ff06f0a
font_02_sfnt_off00009ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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