Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b91d0a00ea0f3b2…

MALICIOUS

PDF

54.2 KB Created: 2020-08-01 05:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 463fbe108fa277974d9ae78c0e7a7e41 SHA-1: 0818151ec8dc05711faf02ddde289118b6c2eab6 SHA-256: 9b91d0a00ea0f3b256dfe656f4a81a2cb5abbea001221cb6b4cb2268fbed8902
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=kalphite+queen+osrs+guide'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being to a Shopify domain. The document body, though heavily obfuscated, contains the same malicious URL and a benign Shopify URL, reinforcing the lure. The primary intent appears to be directing users to malicious infrastructure.

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=kalphite+queen+osrs+guide
    • http://files.highergroundbackpacking.com/uploads/1/3/0/7/130738620/b23fe0a7fc62.pdf
    • http://files.portstanleyartguild.com/uploads/1/3/1/4/131437987/vedasizepop.pdf
    • http://files.sylviakeita.com/uploads/1/3/2/6/132680827/1745ecb057eb9fa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/40741564729.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/40720335390.pdf
    • https://cdn.shopify.com/s/files/1/0429/5658/7174/files/nj_driving_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3791/files/fokibidajupafutumo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/666949399.pdf
    • https://cdn.shopify.com/s/files/1/0434/3732/6502/files/annexure_1_pdf_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/92899402056.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/74224713292.pdf
    • https://cdn.shopify.com/s/files/1/0433/6946/3959/files/wavaduzumuga.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/veweg.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_off00007ffe.bin
a67c8c8687d0a02a8ef445003cdfb89ac099d4a2fa6dbd113c0d0a81908be859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFE 5316 bytes
font_01_sfnt_off000091fd.bin
5481159af128b6a122f8b79f85ed6e4b84eafbcea87a27d4f324a603df24a15d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FD 6592 bytes
font_02_sfnt_off0000a386.bin
81cd5996bc27bbaab647d8c1c2993cb7fc9053ef9887e51671ebb60972833b3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA386 12792 bytes

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