Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff16a337b747e8e4…

MALICIOUS

PDF

48.8 KB Created: 2020-08-05 18:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eb1872732b012d34238195c76d93c42 SHA-1: 88756cf363cef3283c4e9d727c0004d481f27c64 SHA-256: ff16a337b747e8e4de0d5893d40ffe1b3fa94314933e83d7b6f857eca8a84e7c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The embedded URL 'https://ttraff.cc/pify?keyword=bsc+computer+science+syllabus+du+pdf' is the primary indicator of malicious intent, likely serving as a lure for phishing or redirection. While the document body is heavily obfuscated, the presence of numerous links, many pointing to Shopify domains, suggests an attempt to distribute malicious content or redirect users to malicious sites.

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=bsc+computer+science+syllabus+du+pdf
    • http://files.kickapoovolleyball.com/uploads/1/3/2/6/132681698/4718526.pdf
    • http://files.billings-equestrian.com/uploads/1/3/2/7/132741476/fipadavunoguguf.pdf
    • http://tiporiki.thursdayisthenewfriday.org/uploads/1/3/1/4/131453674/544d46af5.pdf
    • http://files.dlsu-aki.com/uploads/1/3/1/4/131438460/puzuv-kedabibuf-rasogaratum-xeneju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66048758492.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/rutadosaxudejuzob.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/crossy_road_hacks_no_survey.pdf
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/8342072095.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/malunuseruve.pdf
    • https://cdn.shopify.com/s/files/1/0432/5035/2296/files/gulekamoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/xidufoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/459600417.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/92315108847.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/how_to_setup_a_discord.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9605/files/26956070706.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/51911383976.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/fm_21_76_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/96940615337.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_off00007223.bin
7692aa416dc058a37d7dbf769cae5319ec39ce440a6ac59bc9876ede32a9957c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 5592 bytes
font_01_sfnt_off00008515.bin
39ddef06c9bc28a738c4466dcd3ce92ddfdb38b51944311557406f1372d0f0ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x8515 15908 bytes