Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faac9a92f8feb94…

MALICIOUS

PDF

43.3 KB Created: 2020-10-06 11:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ebb3128a124b39850083fd67ea002fe6 SHA-1: d7b24c18537a54792942bdd4d33ee6cdbf6fbf47 SHA-256: 0faac9a92f8feb94e263eb190d30b8c88eeb25427cfd207cefbe9cdd96889324
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link to a known malicious redirector, cctraff.ru, which is disguised as a search result for academic notes. This suggests an attempt to redirect users to a malicious site, likely for phishing or malware distribution. The presence of numerous other PDF links, many pointing to benign content hosting sites, indicates a potential SEO poisoning or link farm tactic to improve the ranking of the malicious link.

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://cctraff.ru/strik?keyword=a+level+quantum+physics+notes+pdf In PDF document text
    • http://rasijawu.howtobeaweddingofficiant.com/uploads/1/3/0/7/130738568/ruzupukalobirij_mexejasaji_ledivibiro_pimil.pdfIn PDF document text
    • http://rateb.atouchofclasshairsalon.ca/uploads/1/3/2/6/132681378/8b082d3aa545cf.pdfIn PDF document text
    • http://files.sidemountainspecialtyfoods.com/uploads/1/3/1/0/131069819/guzef.pdfIn PDF document text
    • http://nosoto.remembrancestars.com/uploads/1/3/1/4/131438044/sakeluram_regetetolekuk_wotogope.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/1/0496/2825/0276/files/semiconductores_electricos_materiales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9350/2373/files/lortone_rock_tumbler_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/61662891241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478bf225-f43f-4e5a-bf14-b1b60f96614a/47595346107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98795df-99ee-4750-ac50-82a6ec78eb02/859999781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc7ecba-1863-406e-bcc3-6d326b99badc/dilelube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab209af8-85ee-4b5a-9f34-040d9b081c54/murakubusaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/callaway_strata_driver_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9440/4008/files/can_i_reset_roku_pin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/27057264859.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_off00006a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A73 5576 bytes
SHA-256: 5532a0f15704f0ce7e04ce8dae6d15869f48ad07eb225b5790093bc487695dda
font_01_sfnt_off00007d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5A 10240 bytes
SHA-256: 34a05e9be9fb1d54521f39534008c5edba2cf16113fec4327d4564dd7a90e3e6

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