Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefcdfbf3d5af1aa…

MALICIOUS

PDF

38.5 KB Created: 2020-08-23 01:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dc555ebc4b51d35f661d002117fd432 SHA-1: 53af256566c503363b44b9fe52590017da02aca0 SHA-256: fefcdfbf3d5af1aaaf8c9f439f2751cc9d44ebc43c73f76065eb38a7332bb429
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.ru/pify?keyword=barito+pacific+annual+report+2016', suggesting a lure related to a financial report. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy to potentially distribute further malicious content or improve SEO for malicious sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=barito+pacific+annual+report+2016
    • http://zusugize.thebaileybakery.com/uploads/1/3/1/8/131857054/kelasuvobafulodomaki.pdf
    • http://kogifewa.aeesei.com/uploads/1/3/1/0/131070571/badabezuwufuw_bedixubeviwonam_nokudagave_falipugesuvulo.pdf
    • http://files.hkcompetitionassociation.org/uploads/1/3/1/3/131379594/kazewasajinujijit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9175/files/font_arciform_ttf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/ethiopian_grade_9_biology_student_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/vilamofizujamirol.pdf
    • https://cdn.shopify.com/s/files/1/0438/7966/1736/files/ivy_tech_accuplacer.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8544/files/pivofukopuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6390/files/modified_mrc_dyspnea_scale.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/66411007371.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9324/files/zelopokeduw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/vepivalerefapo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1347/1384/files/nepopudo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004acc.bin
6c5784555ee32819089732889eec886addc456031de4b41a794e21194b4597c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ACC 5240 bytes
font_01_sfnt_off00005cb3.bin
d49bcde42438d5c29ed4cb4c9a40c7e4b4414106663373a66305e6759a976d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB3 10156 bytes
font_02_sfnt_off00007f4f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4F 4324 bytes

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