Malicious PDF — malware analysis report

Static analysis result for SHA-256 615f9fea8566c780…

MALICIOUS

PDF

52.0 KB Created: 2020-11-04 19:09:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 83bfaafb0fa117e5d27579c4a3215051 SHA-1: 59562352d3a91a059eff47fc6b12751fc678acf5 SHA-256: 615f9fea8566c780c17e50539fe597fd4a9e7f7cc2d01c5ed3293642bb81dc35
202 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a malicious redirector and a brand-impersonation credential phishing lure, specifically impersonating Facebook. The document body, though heavily obfuscated, contains a URL that points to a known malicious redirector. This suggests the file is designed to trick users into visiting a malicious site, likely for credential harvesting or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://ttraff.cc/123?keyword=music+videos+for+kids+church.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/123?keyword=music+videos+for+kids+church In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5fa0ce7203595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5f9534a8a0969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_5f958ccdd8ac8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/12851952696.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/57466558153.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/nijal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218001b5-2474-41e3-8640-38d8fa580e47/9920991674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7521/8837/files/65623644511.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/the_animator_s_survival_kit_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5738/1027/files/anti_possession_tattoo_dean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7691dbf3-1cbe-4e09-b4ac-4e1c22a56e8e/standard_hotel_cafe_los_angeles.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/lepudiroxuxum.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/rectas_y_angulos_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17a3440-ab5b-4dbd-8a13-264ca1961a63/zufaxilopomupikukozomaxe.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_off00008ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA1 4996 bytes
SHA-256: 734f485ec20bc7a2fa2bcdfecd7f26ca69fb473ea0b53c08214954ba87d73eef
font_01_sfnt_off00009db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB5 10932 bytes
SHA-256: f4024a9e051d52403cb5caa3e2db62040e82f53a7f21673afe6e440d6e8c8a53

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