Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9a34f4fde41acd…

MALICIOUS

PDF

48.1 KB Created: 2020-08-06 14:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b63cf5b950c5e7eefcc31600dac3d89 SHA-1: f1da1889f5775c503413ca4397af7844b245ef15 SHA-256: cb9a34f4fde41acd3458f70037a17f4d07d7c8b8b7c12823619d463115d080ed
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a PDF link farm. One of these links points to a known malicious redirector, suggesting an attempt to lure users to malicious infrastructure. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pdf+of+candlestick+chart+pattern
    • http://files.cc-tutors.com/uploads/1/3/1/4/131483110/8937550.pdf
    • http://files.sinagprintingpress.com/uploads/1/3/1/4/131438718/miwugujez.pdf
    • http://files.rfmconstructionkilkenny.com/uploads/1/3/0/7/130775002/wixaxid.pdf
    • http://files.coralgardenonline.com/uploads/1/3/0/7/130775129/ratubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/niruve.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/65406341519.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/metro_rail_delhi_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/9016/5403/files/soda_license_key_generator.pdf
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/azure_machine_learning_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/8511/1203/files/86278945978.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/zinugaleleluliwafexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/nikekup.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/vetetaganok.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/84593760994.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sebifoxof.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_off00006ffc.bin
574d5953c38733cd9824daac82914ae2256c80d750f5f116b709cbfb4e11a61d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFC 5096 bytes
font_01_sfnt_off0000813e.bin
1708b40cdaf412b31b5eee3de527af3cd3eed1f7955d350a3f2ee347d07ccae9
pdf-font-stream PDF embedded font (sfnt) at offset 0x813E 10620 bytes
font_02_sfnt_off0000a564.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA564 4324 bytes