Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeab47d1a5187cd9…

MALICIOUS

PDF

41.3 KB Created: 2020-08-06 20:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7431c75b669803f185082da3d3154e53 SHA-1: c70561dba17fc5a94055900b2bdc2d016085eb86 SHA-256: aeab47d1a5187cd9ff616c9b680b40d3a53dce55cd4419ef08418dc919d3132c
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.ru/pify?keyword=general+mathematics+101+pdf. The document body, though heavily obfuscated, also contains this URL and numerous other links to what appear to be benign PDF files hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The primary intent appears to be redirecting users to malicious infrastructure.

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=general+mathematics+101+pdf
    • http://files.immune-tolerance.fr/uploads/1/3/0/7/130739022/ca2378255.pdf
    • http://vevogeli.stokolvision.com/uploads/1/3/0/7/130776407/cb353b4.pdf
    • http://files.shawnhurleyministries.com/uploads/1/3/1/4/131406068/fuburorotisil_fesojewakatak.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/freckle_juice_chapter_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/34730243405.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/33353258208.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0450/1933/2766/files/alimentacion_escolar_saludable.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7727/files/how_do_you_convert_to_word_document_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/zudatijoledozojibokubutav.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/2356936437.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/oxford_wordpower_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/fawekuvalod.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/lowes_harrisonburg_va.pdf
    • https://cdn.shopify.com/s/files/1/0436/2951/0814/files/50397490758.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_off0000562b.bin
1bc50eaa1630d3558b7622ae28bd29d3a6407535864efcf17450b8191c8dd5aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x562B 5296 bytes
font_01_sfnt_off000067fc.bin
5c1fd1adb58f64b6beb160608fb941349c52fbca15d5c29515b46f8bb4620e67
pdf-font-stream PDF embedded font (sfnt) at offset 0x67FC 10068 bytes
font_02_sfnt_off00008a6d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6D 4324 bytes