Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4b597bb9fed970…

MALICIOUS

PDF

49.4 KB Created: 2020-08-12 21:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6264d0da5e72a6ac090f426a29e83507 SHA-1: 0fce84eb7c18302f905a7c142f240258de834fa0 SHA-256: ec4b597bb9fed9707573bf79acc3680777874a54c974fee150bf282b6c6b2ade
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=speak+now+1+workbook+pdf+download'. This indicates the document's primary purpose is to redirect users to malicious content. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence for the attack pattern.

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.cc/pify?keyword=speak+now+1+workbook+pdf+download
    • http://nawunigem.sherrithewriter.com/uploads/1/3/1/4/131482995/mitosifu_kafinaf_mozitumagenum.pdf
    • http://files.babiesandbackbends.com/uploads/1/3/2/6/132695438/9740942.pdf
    • http://files.sparklesnspirit.com/uploads/1/3/2/7/132712129/5054206.pdf
    • http://files.murdermiletours.com/uploads/1/3/1/4/131453990/2420117.pdf
    • http://files.nraimvang.com/uploads/1/3/1/6/131637313/60e94fdcd.pdf
    • http://files.sparklesnspirit.com/uploads/1/3/2/7/132712129/5
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/disneyland_california_adventure_map_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/vinisadupavilimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zisavugeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9600/files/6365595640.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/convert_to_word_doc_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3587/files/37913872470.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/9769833315.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/pakadagojet.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/wafobepaziminojafusurarej.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3658/files/86845644028.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/wuvuj.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_off000076bd.bin
eff589a3521599fa21df35c47988869b93c0d4960e964f447a2471fe952e86a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x76BD 3528 bytes
font_01_sfnt_off00008379.bin
5a38939addb30cbf56bcf74bc8ba4fae70f06803d4b57df0e92fedd3ad2eddef
pdf-font-stream PDF embedded font (sfnt) at offset 0x8379 5308 bytes
font_02_sfnt_off000095a7.bin
071e24f7dc76dad6e5eea075bc7a0c789593c509e2449bda106988ad6cb6cc54
pdf-font-stream PDF embedded font (sfnt) at offset 0x95A7 10028 bytes