Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2c3d706406153a…

MALICIOUS

PDF

46.2 KB Created: 2020-10-15 17:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4b28853622de36418395ceafb69b0d6d SHA-1: 66a888702cb4aeddb6bb074077a23a80f318dbea SHA-256: ae2c3d706406153ab0657b8c458b6d64b50162ef2cfb7158cf742ac7c0e620c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. The document body itself is largely obfuscated but contains some of the URLs, suggesting an attempt to disguise the malicious links.

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://ttraff.club/pify?keyword=projection+and+coordinate+system+in+gis+pdf In PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/miwijunuruxodot.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/towar.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/kunexafaw_wejolafuwezejon_dulivotopasom.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/waxugozukidu.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/eb5a71ae5.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/lomupivujid.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/75de7.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.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/1/0434/5777/3728/files/varuvakamoxebexatibedudal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2732/8935/files/fragments_of_horror_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8247/4163/files/princeville_high_school_basketball.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0649/8728/files/xekonajolumido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3309/0974/files/detopipop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7412b6fb-8cbf-4916-a8c8-fc7dfe17f28d/kaxijixabifuganusaretabor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8fa239f-d6c7-4202-a3e0-0e7152f8a4c7/41028416346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199c2843-eba3-47f6-9191-7c050751dad3/tajuxifumezikesol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aeba63f-52e1-48fa-8cd0-a94d3eeaac6d/56570538401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9733da6-9e34-4d7a-9282-e9847143e7de/fumolowoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44394aa8-ad3e-41ef-b1cb-15f5ca8b4346/begivuver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d105df7-acde-476a-a7fe-f895c2607432/21560249420.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_off000075ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75ED 5620 bytes
SHA-256: b664c036eaeebb3613d8617a6b608ae97e72fdd9a79e7855508473a9d3eff385
font_01_sfnt_off00008901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8901 9948 bytes
SHA-256: 879c36ce70f228432b003df102dd9384534ecfc5ba85bb691edaf5b0735f5918

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