Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada49855a11b3df0…

MALICIOUS

PDF

37.4 KB Created: 2020-10-27 22:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 67be665311c42ce865832885e073ccf9 SHA-1: 16da88febced5117581b8d378b4ff9ff65fc0871 SHA-256: ada49855a11b3df04b45875b639372166a30f10a3cce3146b120d142db1ece2e
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the document body includes text suggesting a callback lure, further supporting a phishing or scam attempt. The presence of many links to external PDFs indicates a link farm, likely used to distribute further malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=the+peach+pit+cafe In PDF document text
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/divanekurepevi-bibebakokokag-leraje-bulojitu.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/namazaxa.pdfIn PDF document text
    • https://redawisifakaw.weebly.com/uploads/1/3/4/4/134481039/6592131.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/mipepamugexozor.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/f076422f004.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/xefejevife/winegopijelibidawiwilu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/xetebuwevifa.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/alfabet_po_angielsku_z_wymow.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/baixar_livro_as_catacumbas_de_roma_em.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/architecture_thesis_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/96471515934.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/29564138234.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/vurejategajukilekowulobo.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/mosiradimijitok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/9651/4972/files/cuban_missile_crisis_movies_on_netflix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3972/2138/files/lizuganarexozarulig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/iaf_result_2020_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/dajexekujon.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/goxenuxowifobu.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_off00005399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5399 4744 bytes
SHA-256: 5a6ccd1b99e5389eb04a650428f399bc5f7b7205a0b73440029cc63342c95898
font_01_sfnt_off000063c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C0 11000 bytes
SHA-256: a6fefd9c5910757afdacf3073656697c196599394d368bea03169378b2e3409f

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