Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c881b02489ae1ee…

MALICIOUS

PDF

43.6 KB Created: 2020-10-18 01:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cc3abcf3b0996c1ed4a3da28b26573c2 SHA-1: f74e6f59486016ebd67671c92604fc0044f7ed0a SHA-256: 0c881b02489ae1ee076f196c8f63c37864e6885f99d7581ac78c231b8313de95
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ggtraff.ru, disguised as instructions for a water pump pressure switch. The document also hosts a large number of external PDF links, many of which point to benign content, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector is a high-confidence indicator of malicious intent.

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/123?keyword=square+d+water+pump+pressure+switch+instructions In PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/gamutemogavew.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/navowifepefewafo.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/lovezujojejiz-marofefefaka-muputajiwube.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/c3208de3-a7db-4227-b9d1-8d26495eec6b/78581847830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8592af1c-96c9-46bd-be1c-99daa1a5aed4/fenuviguxaxarajutesod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e3e919d-3322-4f1c-bbff-5b8f8e141c23/lonik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7498/6399/files/15898180510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/japanese_romance_movies_2019_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5140/8283/files/wovidesisometo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1917/2002/files/church_and_chapel_ritter-larsen_bros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5103/1447/files/xubumozofutupozir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9548/9189/files/xorodirasezekaxedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4702944-dd5b-4ec1-9b91-a292ff49935f/mejadurozaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6c06038-e001-41c5-9df3-12d4f7a17015/zolegoxidifekidapuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17cc91b-1aab-40e1-bd77-0c445e13c286/pasubitezakuniperini.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_off00006b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B79 5604 bytes
SHA-256: 14dc52f12420a99e8c209c52eb4cf5649c2a08ca093b50365f9a129f09a0b76d
font_01_sfnt_off00007e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6D 10244 bytes
SHA-256: fb8ceb6c98374eea620d616b156ead35bbcf7d47842cf2061b7783f837bcba2e

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