Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24eb555298555d8…

MALICIOUS

PDF

39.5 KB Created: 2020-10-17 13:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 816985c37d4606fdb67601ebf53b2bb4 SHA-1: fa5448048e2bde1a37e733d9592f0188bed2d4c4 SHA-256: f24eb555298555d8ceeb51d537c332347df6ebc6631c9499b5b396af48e4be75
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/123?keyword=march+2020+sat+qas+pdf In PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/wijiliso.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/606c3c.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/rugenefenepufemaseg.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/b61c79fb0c3.pdfIn PDF document text
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/bivavonef_lawolalapitew.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/kejivof_jumebefoli_xugipatuwa.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/5337016.pdfIn PDF document text
    • https://fifowekuvepu.weebly.com/uploads/1/3/0/7/130776735/lomoxudodepajoniwes.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/1/0435/9376/0931/files/alison_victoria_is_she_married.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/35619786031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2743/0059/files/50066693408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/beninizafunegebotozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71978bd-34e6-4718-ba98-1342149a7064/34900309526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0668ce8-6769-4103-8645-7517f2834acb/9351161992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8405c68b-9c1f-472c-a071-f9e2ee3d8e9c/66506699110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4413ec06-c973-4ca7-ac24-342ca8ece3af/nekixesovakamirov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9582b0a-e822-4f87-b701-81ec7551a7e7/falufudijulanox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8529/4494/files/37471319859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5736/5670/files/68950560382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5764/2152/files/44764659941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6504/0282/files/transactional_communication_model_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3949/1749/files/5634108452.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_off000058d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D0 5616 bytes
SHA-256: aebc3906cad4e5ec977758af86e15627557f7700cf4c96116c314b75aafa083b
font_01_sfnt_off00006be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE6 10460 bytes
SHA-256: 3ae5f632591ab34f299daa281ee17a42d8dd0004d76537a34a087539ae648677

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