Malicious PDF — malware analysis report

Static analysis result for SHA-256 044d009013bb5f1d…

MALICIOUS

PDF

42.2 KB Created: 2020-10-16 09:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d40d25a4be4d7eaa6e80d53302be8673 SHA-1: 9d99a8a8d0f8cdf35f50b2c073c623f94d86d335 SHA-256: 044d009013bb5f1d158f16c14d2ef4cfdc9eb83698cbad2858368dead052599c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One prominent link, 'https://gettraff.ru/123?keyword=sdlc+life+cycle+tutorial+pdf', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect the user to malicious or spam content, aligning with a phishing or SEO spam attack pattern.

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://gettraff.ru/123?keyword=sdlc+life+cycle+tutorial+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f8736d0307b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f87d27addad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f87441fd7f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f87177226f73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f873f016fc23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f87bb26351a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f88ffd1933bd.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/9371271.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/e2c6bde.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/wetoviwebotuzo.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/1/0502/4881/0676/files/android_listview_set_scroll_to_top.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7485/1494/files/7_inch_heels_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/ponubawobofuvufewodexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8461/4299/files/8575429211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f253b0-ac23-41df-8fdc-45dddeb20fec/85529546588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be73a4f4-d14c-4dc2-83c5-148c102b6a87/1325818577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9921a83-7240-483e-a9e6-e8af6c5b7724/50487066664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ad698a9-532c-4e56-b92e-45aded7ba141/dotet.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_off000068b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B8 5176 bytes
SHA-256: bef8c7e3c87e869d50e6ee70ea5dc4fa0ee2fc04dca8c34fab32e2c8c0198975
font_01_sfnt_off00007a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A67 9800 bytes
SHA-256: 23808682727b9389bc6afc20385093bc151be4c1f1543c5814c3468710ae4add

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