Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf76fb2dea603dab…

MALICIOUS

PDF

46.6 KB Created: 2020-08-30 15:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 964b27f97ff6d821868f12869400c32c SHA-1: e8592284b3de356d3d72fcc9eefbe0b152f9c72f SHA-256: cf76fb2dea603dab9bf6e60cb2b30be456834ff9fb0d567d8845eb94d1a403bb
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link-farming or redirection attack designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL that triggered the heuristic, indicating the primary lure. No scripts were extracted, limiting further analysis of the payload.

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.com/wix?keyword=poemas+de+gustavo+adolfo+becquer+pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/bookkeeping_reviewer.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2261/files/jititazoletafovovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/96769199454.pdf
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/45269500179.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/7276337493.pdf
    • https://cdn.shopify.com/s/files/1/0429/1841/2451/files/assassin_s_creed_syndicate_xbox_one_code.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/wireniletupefisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/tcp_ip_protocol_suite_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/93819763100.pdf
    • https://cdn.shopify.com/s/files/1/0459/0102/1338/files/cycles_of_matter_activity_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7075/8820/files/dibakisazokuwoleguw.pdf
    • https://cdn.shopify.com/s/files/1/0437/2093/3528/files/82249183269.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_off00006699.bin
33c3cf8120e3960a6b9e36e7a530c688a76d267e8731b2c5b6a135c4416636cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6699 5532 bytes
font_01_sfnt_off00007969.bin
3285cc92e5adf954b821ac4b4fa85783aa0600839eaa4cd092164b8266ff4ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7969 11236 bytes
font_02_sfnt_off00009dee.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEE 4324 bytes

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