Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ef07271c9829be…

MALICIOUS

PDF

48.6 KB Created: 2020-10-29 12:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: adf278429fed1924127e32d75dec8ceb SHA-1: e20e1f4bb1d6db5ee622db650db6f5fd0d047e00 SHA-256: 90ef07271c9829bea1229fa500fc9cedce8231bb84ee8adc183dc87af6bf25be
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a PDF link farm, suggesting a phishing or scam attempt. While no scripts were extracted, the embedded URL and the nature of the link farm indicate a malicious intent to redirect users to potentially harmful content.

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=free+knit+pocket+prayer+cloth+pattern In PDF document text
    • https://wegupufula.weebly.com/uploads/1/3/0/8/130813429/fidif_wafomekoxije_fevopezola.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/fegabugojirira.pdfIn PDF document text
    • https://sasenepekevob.weebly.com/uploads/1/3/4/2/134266747/d163ef0c4aa3.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/gotenukevepunin/fisajokesimubufomake.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/34530963509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d758fcd-a720-4d6e-96a3-3c91340ae5c6/nomafuves.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/multiplication_table_of_300.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/cape_breton_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e24c2b-9216-47ee-8627-cd831601eaf7/sedudarij.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/jatapekafewatovibugij.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/96308977967.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/89369690494.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/97237858209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b0b1fc-1cc4-4883-b4a4-a6eb85248b75/91005477833.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/kojewugovo.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/ex_raid_pokemon_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/daburasurozokosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6baeb62-d23d-46b5-9fc4-78c1d042d4ab/pitepakogavixosunine.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/ultimate_beginner_s_guide_to_real_estate_investing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d26592b-bf73-47f7-a06a-be2f2bd6ca38/benomoxotonaxad.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/able2extract_to_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0394242a-278d-4b89-a034-38c911f0fd4a/29359164265.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/goxogidigokugiwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/xixegeroromel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3ba268-815a-4ec4-b597-9e936ae66745/33841584592.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_off000080bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BC 4964 bytes
SHA-256: d9cea93ce5a721610e0598c8beab6be8223b27bab53f525d0756f21d7051a036
font_01_sfnt_off000091a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A7 10172 bytes
SHA-256: 609384ee3a0c35f9fee57982b261180e509d750b7a327c467adcb3fa545e7996

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