Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f714ca695171f09…

MALICIOUS

PDF

47.0 KB Created: 2020-09-18 12:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afd69834541a46321e2c7b1dd844c72c SHA-1: c16ad3de4f0fba0dd386b7a50e73424fa777b80c SHA-256: 0f714ca695171f090e85df2b3ffe7ef73dfc5ec67cb4ece0d1867390d02de8b2
162 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One critical finding indicates a direct link to known malicious redirector infrastructure, specifically 'ttraff.link'. The presence of a 'download button' lure further supports a malicious intent to redirect the user to harmful content. No scripts were extracted, but the PDF structure itself is used to host and distribute malicious links.

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://ttraff.link/wix?keyword=katharine+gibbs+nj
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://33ff9736-e4d2-4b98-b0f3-c64c415ed481.filesusr.com/ugd/d48fe3_4a10dea7af794f948c0d69e497b08152.pdf?index=true
    • https://3a5d9397-8a91-4088-98fe-da9dbbe4d5e5.filesusr.com/ugd/26f730_27effcacc0c440bb863f3e769182733a.pdf?index=true
    • https://c17feaba-2dd8-4b19-aef3-e91287d0532a.filesusr.com/ugd/8a05ec_dc8af7697938455ea14f730444b71d7c.pdf?index=true
    • https://7df10bd1-0dac-4d54-9cac-9c2d4294eaf7.filesusr.com/ugd/a891c0_c58facc8ac39424591013de044cf8318.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/4387/1127/files/exercise_32_anatomy_of_blood_vessels.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/noroliwafav.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/list_of_vocabulary_words_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/stanford_brown_dallas.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/libro_para_pintar_dinosaurios.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/12498604991.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/wegemunewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/9604554133.pdf
    • https://cdn.shopify.com/s/files/1/0440/2341/4942/files/seinfeld_meme_template.pdf
    • https://19bb14b2-4f3b-4e2f-98ce-efcc4a10faf5.filesusr.com/ugd/66f3f9_7a626d0c7a6b437fb21328cf61f7227b.pdf?index=true
    • https://a9e492a4-d284-4ec3-bf33-18f060d2be57.filesusr.com/ugd/01bc73_c6c3390f32974b15807a902358620ebd.pdf?index=true
    • https://f4dd203f-8e41-4e95-98a0-d76cfe617c2e.filesusr.com/ugd/544e7e_a88bafd7bbe54b58849e073618db85a1.pdf?index=true
    • https://adf5c40c-dfa8-465d-a660-3d44c75a3019.filesusr.com/ugd/a7074a_bbea7622ed054076aacbd92a504e1565.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000795f.bin
bb89ce852a4d4c44c1930847c7504414a3204b64f83efe66ad6db58d60c96988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795F 5100 bytes
font_01_sfnt_off00008abe.bin
37d125187e661a7848195d83f83e9daf94abcf78348e9aef1a4c25d96a0615be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABE 10696 bytes

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