Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8311ba68fa6f4bf…

MALICIOUS

PDF

46.8 KB Created: 2020-08-05 00:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edc46aab414a14260ba0afe0147e71c1 SHA-1: 9d25ff7bc5a2ad7ecf50de0f19e4ae7ed82a65c8 SHA-256: b8311ba68fa6f4bf1c02fd4910d6a18064e7f670e275f9a62fff98704fec1667
130 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This redirector is likely used to obscure the final destination, which is probably a phishing or malware distribution site. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=small+pdf+txt+to+excel', indicating a lure to a file conversion utility that redirects to malicious infrastructure.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=small+pdf+txt+to+excel
    • http://files.thatjuliegarcia.com/uploads/1/3/1/4/131437806/47df2f378b5ccf.pdf
    • http://files.yifanmake.com/uploads/1/3/0/9/130969645/3f86838e19dc86.pdf
    • http://files.dkgalphalambda.com/uploads/1/3/2/7/132712282/vosalo.pdf
    • https://cdn.shopify.com/s/files/1/0440/3478/5430/files/28391848657.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/census_2020_chapter_2.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/vejobamufoligizanifazuxi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/48650949058.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/mofapiza.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/conners-_wells_adolescent_self-_report_scale.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/free_bradygames_strategy_guides.pdf
    • https://cdn.shopify.com/s/files/1/0433/6920/1832/files/tuxodojelurewopewosedelu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/dnd_5e_unearthed_arcana.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.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_off000064bb.bin
c93a8a0b53f439c78c6105932a5a0bba17b0e9d2a8870a13d592cde410aa652f
pdf-font-stream PDF embedded font (sfnt) at offset 0x64BB 5200 bytes
font_01_sfnt_off00007664.bin
945328392931b9d2dc378038fbfc44437f933c6c40041497cf03dd2749fa9b16
pdf-font-stream PDF embedded font (sfnt) at offset 0x7664 10104 bytes
font_02_sfnt_off00009942.bin
9d161d6e34f835aff196e226d852edde4d65b072a4902c32411b177d8c29261e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9942 16076 bytes