Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ceae616c2f22882…

MALICIOUS

PDF

53.5 KB Created: 2020-08-07 00:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bb1a557d88f65da167a05d1898f81fb SHA-1: 1c520c68af85ec146a8fadfe71be89b28a23a945 SHA-256: 9ceae616c2f228827e3eed30c274619b51b5b433a933d5265248a4baf4d7bdb8
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=addition+and+subtraction+worksheets+for+grade+3+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on domains like 'cdn.shopify.com' and others that appear to be part of a link distribution network. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting it's the primary lure.

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=addition+and+subtraction+worksheets+for+grade+3+pdf
    • http://files.room4love.org/uploads/1/3/0/8/130874458/koban_subozad_lalak_wifufup.pdf
    • http://files.thegiftoflifeproject.com/uploads/1/3/0/7/130776725/1295818.pdf
    • http://dazib.handsofluv.com/uploads/1/3/1/3/131398428/440388.pdf
    • http://files.drawmakesnap.com/uploads/1/3/1/3/131384300/ca192.pdf
    • http://files.heritagephilharmonic.org/uploads/1/3/1/4/131406379/8177707.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/introduction_to_diagnostic_microbiology_delost_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6777/files/nejoridige.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/katajitewoduzawipu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/44322876888.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/79795211630.pdf
    • https://cdn.shopify.com/s/files/1/0430/4125/9671/files/jalomurefuxibakavevozenu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/42983321392.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/69811053540.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/wizixixifumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/2893483172.pdf
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/antibiotics_chemistry_project.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_off000089b5.bin
5f47aab3d15b9234d2bae7edbea96a375ae71f5c0d5aabf6a3dcac0930a56f16
pdf-font-stream PDF embedded font (sfnt) at offset 0x89B5 5832 bytes
font_01_sfnt_off00009da6.bin
1966a85f2c4a38dfd9b5ca336172e6034523bbe49c8ba88c00afddfde8009a12
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA6 13468 bytes