Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc83289908e59a6…

MALICIOUS

PDF

34.2 KB Created: 2020-10-07 06:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fc22e13d6dd9ba8adbbe2c6035f5a673 SHA-1: fb09767825110b60050ff14fd2c21706d85ae849 SHA-256: cbc83289908e59a692870f01ac70e59553a87f6f2990e27ef137a24496153710
124 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://cctraff.ru/strik?keyword=my+hero+academia+season+2+episode+14+english+dubbed', is the primary indicator of malicious intent. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to lure the user to a malicious site, likely as part of a phishing or malware delivery campaign.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=my+hero+academia+season+2+episode+14+english+dubbed In PDF document text
    • http://files.travelblogonline.com/uploads/1/3/1/3/131380600/gabilogizepow_nesebig.pdfIn PDF document text
    • http://wopog.vcnz.org/uploads/1/3/0/9/130969685/pexifika_lukubos_zuvenegibi.pdfIn PDF document text
    • http://files.lovehealthyme.com/uploads/1/3/1/6/131637797/77ccd384.pdfIn PDF document text
    • http://files.ballinloughgfc.ie/uploads/1/3/1/8/131856569/4284019.pdfIn PDF document text
    • https://site-1039162.mozfiles.com/files/1039162/99110139140.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/83711155429.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/3232141b-59ed-4314-92f2-0ecda261c9c4/rolisobateginefojuxabodaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a025de3-bb20-48a1-aeff-596e7814eb97/78728473494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c73d0e-8d9d-485a-9a08-962aa4f5df08/45092085341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f1c598b-7644-4204-9eda-2a7b1aa7acc3/wazakitagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0025619e-829b-4d27-8c0c-4d2e79738b0f/sinogukizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/moorish_literature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/piano_key_stickers_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/nidawonevusuzuwavudiparet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/0748/0476/files/aroma_rice_cooker_arc-363ng_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7167/6314/files/linerumisowedewijitamowun.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_off00004743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4743 6004 bytes
SHA-256: 6dc77c58fd74b6bc040d6ba74ec7619e6e660c6f5194df2a18e7c1b7c62b6934
font_01_sfnt_off00005ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA3 9312 bytes
SHA-256: 0be2523882cc207b2827efb122ee1ea24ac115fbc46c9459ed5dbd880a907d51

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