Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7036cbb16d8522…

MALICIOUS

PDF

47.0 KB Created: 2020-10-17 22:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2bfb4207867291970164f1adafe25bc7 SHA-1: 56e162f789c850bbc74efeae129a55c51b22adb4 SHA-256: 3d7036cbb16d8522eac41c4037382155017ea7215e184b85252eefce2636d70f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors. One prominent URL, 'https://gettraff.ru/123?keyword=rollercoaster+tycoon+classic+android+sandbox+mode', is flagged as malicious. This indicates a likely attempt to lure users to malicious sites, potentially for phishing or malware distribution, leveraging SEO link farm tactics.

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.
  • 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://gettraff.ru/123?keyword=rollercoaster+tycoon+classic+android+sandbox+mode In PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/0ac65f19349dc76.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/tewulapugofuxa.pdfIn PDF document text
    • https://sukowaletudevux.weebly.com/uploads/1/3/0/8/130874669/2632991.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/wavumopeduwi-vivugopofujudoz-lixepufinuza.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/lokidoradid.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/wotareropajewub.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f8b0a9527c1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5f8b26210567f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5f89f3fc71493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f8a312a207cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f873d1647d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f87dde2e74fd.pdfIn 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://cdn.shopify.com/s/files/1/0465/1194/7926/files/60581775195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2812/7650/files/zuveja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3804/8934/files/24332371613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb3e0b5-f4ec-4230-9773-eebca10dbcf1/naxigolan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce400b1f-8745-43ce-8be8-9ed2cff9c88d/56651659470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f56ac2-cef6-42c1-985b-00558be0231d/rinidigedexujikabukome.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE9 5192 bytes
SHA-256: eb8e0058e4c8cf0792f280d271ac400c1f1e368fe02aa297f4125ec74e5eba62
font_01_sfnt_off00007d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D76 10156 bytes
SHA-256: 700eb3ebfd791207bf0e8f4f7bbbdd525dd70cd5a8ac9c377b896a53960b7ac5
font_02_sfnt_off0000a02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA02D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f