Malicious PDF — malware analysis report

Static analysis result for SHA-256 0295dfc3d96cb8b1…

MALICIOUS

PDF

35.4 KB Created: 2020-10-26 00:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 72807979236f0468e40e23188ce4e0c4 SHA-1: de0adc28b41a1c8016679d41940d073caef25c3d SHA-256: 0295dfc3d96cb8b1dd913ae3e17680c3c051b8c58ff22c700612c86449833bcc
162 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/123?keyword=pharmacognosy+textbook+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5f954a8f8f69e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5f9578b349b36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8979479c60e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_5f8fa67940a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_5f95fb2174792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5f914d205c0dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_5f95fd0ca20f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f88a64e48ab2.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/104719496.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/7856742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5f8edac83d8da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f94ada1a2558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f8dbc0aa7bf6.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/1/0484/9598/4795/files/jetaledibipukaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/60761573786.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_off000048ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48CA 6036 bytes
SHA-256: ce69dcffd140072f109c372b22d015959d583eb9d99328d16990130ebaca5d82
font_01_sfnt_off00005d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3D 10420 bytes
SHA-256: 5f246736b0656f78b53ee0616e0323bbb529503eea67e15db93122085ec32b74