Malicious PDF — malware analysis report

Static analysis result for SHA-256 963a3b00a487bc1b…

MALICIOUS

PDF

43.5 KB Created: 2020-11-01 06:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bf3e24a79765a4158ebe7e78a66d9876 SHA-1: 10e197f5039250bae638deee2631325030f00291 SHA-256: 963a3b00a487bc1b6932375e94339af744e7f022afd9f86d38974ebdea308f6b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating a malicious redirector link. The embedded link directs to 'https://cctraff.ru/aws?keyword=tom+ryan+atticus+paige+foster', which is known malicious infrastructure. The document body appears to be obfuscated or corrupted, but the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/aws?keyword=tom+ryan+atticus+paige+foster In PDF document text
    • https://suvibumaluri.weebly.com/uploads/1/3/4/4/134458401/7819039.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/fifomi/time_travellers_guide_to_elizabethan_england_bbc.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/delegation_of_authority.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc58d0fe-6e96-4549-804a-e9fc2ddb7267/7142468940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/55997075958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9b7f79-e094-4876-bc98-8dee84867f19/liperiwade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/mahindra_tractor_oil_filter_cross_reference.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4474/9731/files/sony_wireless_headphones_mdr-xb50bs_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d032fc-0ac5-4adb-af12-a52ed063481d/ceramic_clay_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/giorgio_agamben_potentialities.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_off00006aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAD 5352 bytes
SHA-256: ccd0b5f0675ea76daf6d3e8b1ced85f51ff798f1fb84060d6f7cb47c247f54e0
font_01_sfnt_off00007cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDA 10848 bytes
SHA-256: 78d9e5d19652e8acf85c4ac0131da4d752cb4e3e556b6bec95dc5e8ac44ad96d