Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff2af5078819090a…

MALICIOUS

PDF

37.4 KB Created: 2020-10-27 21:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c1e47ce4d80ddda94904f4761a44e39a SHA-1: 1c76e29d415dbf18fd5b26d4765006ee8618b626 SHA-256: ff2af5078819090aeca0023ad2376e2f0aad15702c6408dbae90858894c238b5
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 heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to various sites. The ML classifier strongly supports the malicious verdict.

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/strik?keyword=powershot+pro+stapler+manual In PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/c7b22.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/f5df2391.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/0cbd7f35736ab.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/7100730.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/bibesekukemugedovofa.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/2ed0d330-8411-4760-8e3e-6e0f2e9d3fa6/dr_dre_compton_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8689805b-051c-4f21-8a1b-f723a08bf604/niroz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd6245d-e3f5-48e0-a52d-78a279f54e2a/solucionari_biologia_2_batxillerat_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fccba21-8536-4352-8aae-fa7cdeb92d49/94612599844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6712/7963/files/96277422712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/zokedipukexab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3097/3080/files/fanesamudegujukuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5269/9300/files/runonuithread_in_non_activity_class_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/golf_cart_engine_swap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7050/2565/files/tuwewawezab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/9041/7061/files/pronoun_worksheets_for_grade_3_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3290/2823/files/waialua_high_school_robotics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cff8615-a6fb-4ac7-a0b0-e192694d68d0/lijekesonova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf4cfbb-b9f8-457a-9751-50624916b5cc/suguforezijovalomizera.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_off00004da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA3 5152 bytes
SHA-256: 895a1f2684f61bd0941fb304224845ed6e2159500307172295241af4cee8921e
font_01_sfnt_off00005f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0E 13032 bytes
SHA-256: 365ce4459fdddc0b41dfc0a164fa117b150a13965286197a2e6ef6403a73cb89

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