Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c03d903256ae3f…

MALICIOUS

PDF

41.1 KB Created: 2020-08-21 21:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4395e3281262e9822a8990f64302b94b SHA-1: 785ac847954ac9748558abe005a9bc9178452e24 SHA-256: 38c03d903256ae3f21c3b1a0facd9f419f8f3c45e3f1fa17ebebc04cfdbe1208
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=excel+master+sheet+example'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDFs hosted on Shopify and other domains, suggesting a link farm or redirection strategy. The primary intent appears to be directing users to malicious infrastructure under the guise of providing an Excel sheet example.

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=excel+master+sheet+example
    • http://files.halloweencity.com/uploads/1/3/1/4/131437246/594dd2.pdf
    • http://files.stoswaldwinwick.church/uploads/1/3/1/4/131453124/e6c1552332be451.pdf
    • http://xoxuxagim.humanistcelebrantscotland.org/uploads/1/3/0/8/130813478/nikeruxuva.pdf
    • http://jomulunu.dayafoundation.org/uploads/1/3/1/1/131163635/6360331.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/redefi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1053/8147/files/mehndi_designs_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/34286032248.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/bowodopogetajokotasakika.pdf
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/bad_romance_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5354/files/42764473615.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/tavegakonew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/samuwixezejezuba.pdf
    • https://cdn.shopify.com/s/files/1/0438/0105/1293/files/morphological_characteristics_of_bacteria.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_off000063ea.bin
74e8b7d4d4a1154035f7e4478e9fa2f70bee232ff7177451b6b52417235a976e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EA 5196 bytes
font_01_sfnt_off00007572.bin
e25cffcae73f1971d9f802696a6ea56d4f23ecd04558915db413e5b42df2274e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7572 10060 bytes

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