Malicious PDF — malware analysis report

Static analysis result for SHA-256 2757a92e8ed0ed9f…

MALICIOUS

PDF

43.4 KB Created: 2020-11-01 06:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cc81a3b5cebb6ddeb6c780d4b165213b SHA-1: 3239beaf20ca59031a2b0bfc7bb234b18b5f4950 SHA-256: 2757a92e8ed0ed9f86c46cb8bb3512621b4472f54304ef38dba3e432105e6bd3
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL 'https://ggtraff.ru/pify?keyword=cateye+velo+7' and a list of other PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=cateye+velo+7 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/begijufadi/pumobubafu.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/65070001527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74adf43c-905a-48a8-9dde-ab82fada2fa4/65721640227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263bf551-8a08-44b1-807b-5cd172f55913/volulilamupoju.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/91645720957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8478/2004/files/osmosis_and_diffusion_virtual_lab.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/42040502292.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/what_is_twic_card_good_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b00d6b-38fd-46cf-87ac-9864621ca873/putis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9250/7301/files/white_vinyl_wrap_for_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a546b03-f8a1-40d2-8fe8-fd6cb7f64209/sukisidofuwixogabewufuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5d07d0-4885-40b0-b56e-bd5ecb7d5c01/6981165001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cacd8e0-1444-4b9b-a696-58064bf2c0ee/zibimolonamujujekojorex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/825bffe9-03a5-4ee9-8ce8-06bf99124492/your_invisible_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace82c91-53f4-4714-bd96-c41132ba08f3/99305219668.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B79 4304 bytes
SHA-256: 80b96c75d3492308de06f6676e58c3e37e7f2b3a62b2961eb52abcf099ce8599
font_01_sfnt_off00005a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3B 11076 bytes
SHA-256: 8fff613e9bb60095c5d905779b62e333b21aeb67e95ce69e4f1b4f3d6b31ceda
font_02_sfnt_off00007d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D96 16160 bytes
SHA-256: 31f54bf1b2a0bd5fcefce680aa7bc0ab7b2c48a0f9a6877104dd616c0c0a5462
font_03_sfnt_off00009292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9292 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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