Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be1a5386d0e05fc…

MALICIOUS

PDF

40.0 KB Created: 2020-10-15 10:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0e563c9eeea1b4e382c3ccec30a8111e SHA-1: f15651142508061ea8dd629684efbfe9f00d9dd8 SHA-256: 4be1a5386d0e05fc65e97388330103ecdddc513442d131d3e3d2eb2a90d02b68
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a URL associated with malicious redirector infrastructure, specifically mentioning a download for 'my talking angela mod apk'. The document body and heuristics indicate a lure to download content, likely a malicious application or further malware. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm used for SEO poisoning to attract users searching for specific downloads.

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.
  • 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://cctraff.ru/strik?keyword=download+my+talking+angela+mod+apk+revdl In PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/larurozinuko-jasiwopima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8708ee17ae9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f87847335fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f872b86da7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f874b33099d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f87ed1c25529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f871bc4d24c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f877b2512906.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/1/0437/8676/4446/files/psy_2012_ucf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7374/4277/files/snapchat_download_apk_iphone_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0236/3556/files/lifoxelekizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3070/8129/files/felogirituleves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8113/0691/files/global_issues_local_arguments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1cf938-95ab-4c07-bbb4-ce6e0adbba86/21780000211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/684e3f38-9b96-496a-b58f-7c12f1557cde/rusujikixikifofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c3972c-7ef6-4979-970e-3547d66465d1/xagafamaxixokebodozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5983/0680/files/cube_escape_the_mill_white_cube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1701/0837/files/33817486030.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_off00005eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB2 5416 bytes
SHA-256: b4a1241cef86f44ada950f8d7f8865e6b8399bc986c3eae302f7eb881d192148
font_01_sfnt_off0000712c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712C 10048 bytes
SHA-256: bc3770a18d5f5d3c2f9f7a725527a73fc4df2cb39f1282dfd49229ef3efc0f77

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