Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f135196e9b6455…

MALICIOUS

PDF

62.3 KB Created: 2020-08-19 12:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ec8e795d8f6005549b98868a2366b94 SHA-1: 78962b80d344e68afb69eb318a2a148b26c82f88 SHA-256: 44f135196e9b6455808a22454e0b4a64342b66cd9c00e7a9588a7aed1b2bb8b9
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as educational resources, but the primary link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the target URL 'https://ttraff.cc/pify?keyword=us+history+textbook+11th+grade+answers' and several other URLs hosted on Shopify, likely to improve search engine ranking for the malicious content. This suggests a phishing or scam attempt using SEO techniques.

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.cc/pify?keyword=us+history+textbook+11th+grade+answers
    • http://files.corshambridgeclub.com/uploads/1/3/0/7/130776578/wifamesuxik_wuzerofid_firewesedi_vuralutineliti.pdf
    • http://bezuta.clevelandburlesque.com/uploads/1/3/0/8/130813528/7701862.pdf
    • http://files.harveyhensley.com/uploads/1/3/1/4/131408415/8193914.pdf
    • http://bomiveki.businesstodaynewsletter.com/uploads/1/3/2/6/132695742/869214.pdf
    • http://files.club-kizomba.com/uploads/1/3/0/7/130775228/234242833d3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/13067973954.pdf
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/rulirowesed.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/24314293320.pdf
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/pais_brilhantes_professores_fascinantes_augusto_cury_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/6224391828.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30740110423.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/divixijadokexiriwolufoj.pdf
    • https://cdn.shopify.com/s/files/1/0447/4827/5863/files/cycleops_fluid_2_trainer_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/fizibejomilefebesiveboti.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0520/files/anabase_xenophon.pdf
    • https://cdn.shopify.com/s/files/1/0452/2462/4288/files/best_books_for_learning_chinese.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/sewing_book_download.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
stream_005_off0000cf92.bin
64e00c3f5b7ab61e81ee5e1ef38d3f9ecd942b20df6117951c07ddfdccc76e55
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCF92 18380 bytes
font_00_sfnt_off00009003.bin
8350476d256d0c4151926548b915b02a58d6b1ce4842b230a1fd348e2bfb1813
pdf-font-stream PDF embedded font (sfnt) at offset 0x9003 5564 bytes
font_01_sfnt_off0000a305.bin
67213d638a03eb562d4871c6a34199e7c6fbf9e9a9eb503b1a837fc93f8af32f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA305 13756 bytes