Malicious PDF — malware analysis report

Static analysis result for SHA-256 4997c9a8f7f1737f…

MALICIOUS

PDF

57.1 KB Created: 2020-08-11 13:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f9ab0b97b7ef2b1c4c8c1cef69ad65e SHA-1: 78d27fe41d7c49f7f6227746408dd3a4f3a552b0 SHA-256: 4997c9a8f7f1737fa856f1d706d21c3c2411f9fa5e9f46a09b6eb53070f289a4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading an academic PDF. This URL, 'https://ttraff.cc/pify?keyword=actuarial+mathematics+for+life+contingent+risks+2nd+edition+pdf+download', redirects to potentially harmful content. The presence of numerous other PDF links, many hosted on cdn.shopify.com, suggests a link farm designed to obscure the malicious redirector.

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=actuarial+mathematics+for+life+contingent+risks+2nd+edition+pdf+download
    • http://files.karinridgers.me/uploads/1/3/2/6/132681812/kipuxisaxajalabise.pdf
    • http://files.saravongillern.com/uploads/1/3/2/3/132302824/7244669.pdf
    • http://volekuj.kriti-jain.com/uploads/1/3/0/7/130739592/muguvefopu.pdf
    • http://fukukapej.empiresafetysolutions.com/uploads/1/3/1/4/131438641/rexejijoxun.pdf
    • http://files.college-conference.com/uploads/1/3/1/3/131382491/rurufawexixesug.pdf
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/physiopathologie_menace_d_accouchement_prmatur.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4432/files/suffixes_worksheets_for_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/32067046394.pdf
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/fidodulutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/the_nines_cast.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8440/files/sirizoxija.pdf
    • https://cdn.shopify.com/s/files/1/0431/5139/2922/files/zarabujinovemojuzugisakiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/1345/6550/files/80757912704.pdf
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/22754919863.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/63840290239.pdf
    • https://cdn.shopify.com/s/files/1/0429/1782/2620/files/sumuxunaxowukokoleb.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/lejum.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1318/files/30110808337.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_off00009456.bin
e5034575aef038d36e264e2c00540218a321fab9980e1272ad7a7e358f5a08dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9456 5848 bytes
font_01_sfnt_off0000a82a.bin
ecb036278d8312678889e1fe1584697abf7a540e7dcf961af3a094a784532a6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA82A 14840 bytes