Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f39302da6aa7f4…

MALICIOUS

PDF

49.1 KB Created: 2020-08-06 17:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70038e4edab5f6e51642ec01f6758650 SHA-1: 7c5468c8fb5cb4a21eaf9c9fc87a5073600756ed SHA-256: a9f39302da6aa7f4a3dc97ace6a460bf4af4596743e3264e5ec8d796258097a9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=azar+grammar+series+pdf', suggesting a lure to download or view a file. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site. No scripts were extracted, limiting the analysis of further payload delivery or execution.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=azar+grammar+series+pdf
    • http://nomej.stonesthrowstudio.com/uploads/1/3/1/8/131871721/7674457.pdf
    • http://files.doneenbaronecoaching.com/uploads/1/3/0/8/130873826/zojivapimozite-fepajid-potudafeter.pdf
    • http://files.callaoc8.com/uploads/1/3/1/0/131071277/128b9f010.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/22210680982.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/avadhanulu_and_kshirsagar_engineering_physics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/1999_subaru_legacy_outback_limited.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/37842010908.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/ramebexifexapemawe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/bakepekaselorefagu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7354/9974/files/4320000409.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1537/files/rinimaxosaxelilimigonuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/60154575181.pdf
    • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080d5.bin
1c9fded83a815d1a1c3d891b41c7aabcf371d5e0b6cd6b38ed1b883bea5f2a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D5 5368 bytes
font_01_sfnt_off00009310.bin
4ed69ea24dfc58f1b9a4789cfa719e867fd0a3169141843a9b09902d7616a0e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9310 11000 bytes

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