Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfb5e115a1ab5ae…

MALICIOUS

PDF

43.1 KB Created: 2020-11-03 20:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f17add7841db1176e567a1beaafbe4c7 SHA-1: dc795f229a91eeee524c2ea3b4937d2620512c4f SHA-256: fcfb5e115a1ab5ae5e8ce9ed742df2cab8284d1c2725f93c759298d9b4f78150
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document body contains a large number of embedded URLs, forming a link farm, with the primary malicious URL being https://gettraff.ru/wb?keyword=building%20death%20star%20in%20minecraft. This suggests the document's purpose is to redirect users to potentially harmful websites.

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://gettraff.ru/wb?keyword=building%20death%20star%20in%20minecraft In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5f8bd32e47669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f9cfead5ee9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f9eab0521a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f932c07b5e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421360/normal_5f9d536655121.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/5749589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5f91d707eb704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5f9ea6bd411f7.pdfIn PDF document text
    • https://fokakumunimu.weebly.com/uploads/1/3/4/2/134266115/wanasogebabarotidumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f8d25032a054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5f8a6cb50ec19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f884ab8390ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f8d3d17ceae9.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://uploads.strikinglycdn.com/files/7f7c4ce7-9194-4428-b17b-3f84c4bd2f49/uc_davis_political_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90735445-41c2-45b2-baca-092553dde7b9/siwiliroremer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e813300d-e62f-48f2-8bb2-e5d2128e02ac/zalatupenuwovonizof.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_off00005b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B69 5256 bytes
SHA-256: c94f7b088a068b7e2111fde16a09b8afc9cfc216ce93b33984b290a85241bfa6
font_01_sfnt_off00006d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D17 10728 bytes
SHA-256: d450cd4ab0861c3d9bf495e4e55752b5b5c023ce2f2282a2d414ee9659d06a21
font_02_sfnt_off000091c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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