Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddac46dfe11bbb3…

MALICIOUS

PDF

53.4 KB Created: 2020-09-05 21:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89127a33351b528f14cfeea1a607051d SHA-1: 42cef63f2e2e32b69cde6ff7c8fa75048a48805f SHA-256: bddac46dfe11bbb3f3bc61168473dbba95ba75c2d22e83afdeafda925071b253
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, many of which point to a link farm hosted on static.usrfiles.com and ultimately redirect to a malicious URL on ttraff.club. This indicates a likely attempt to lure users to malicious content, potentially for phishing or malware delivery. The presence of urgency language in the document body further supports this. No scripts were extracted, limiting the analysis of direct payload execution.

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.club/wix?keyword=follow+up+project+template
    • https://cdn.shopify.com/s/files/1/0448/1715/4205/files/springer_medical_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7005/files/6109337700.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/19654510420.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/5269927416.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/2669184844.pdf
    • https://cdn.shopify.com/s/files/1/0456/4477/5591/files/best_antivirus_apk_2019.pdf
    • https://static.usrfiles.com/ugd/b8c837_c244bda76f5a4b869960e3469fa1774f.pdf
    • https://static.usrfiles.com/ugd/b8c837_565e142e74bb4bff947d7d6f5e03d185.pdf
    • https://static.usrfiles.com/ugd/804ff6_fa37182de41c45f8876b0dc357f4d64a.pdf
    • https://static.usrfiles.com/ugd/ca300b_38c985ad518a49b58fa8103122edef13.pdf
    • https://static.usrfiles.com/ugd/e0d0cf_ff07e8f5390647cd902145f5f5963925.pdf
    • https://static.usrfiles.com/ugd/0511f5_e76e8c64eafd4433b379c9012943e770.pdf
    • https://static.usrfiles.com/ugd/963627_cce6cba5b8a34a16b60560dfcabb25af.pdf
    • https://static.usrfiles.com/ugd/278743_b9aeca25053a4712acbef12c5bf07578.pdf
    • https://static.usrfiles.com/ugd/c7a620_2a9d37c4216d45b98c029234a9891ebd.pdf
    • https://static.usrfiles.com/ugd/16a96a_b7385ab0e1684590a12c6da543d77b82.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094d1.bin
4832d00d4f6233b65bdc1d6a006a46057de0f2d61f1637c673f689efd84000e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x94D1 5024 bytes
font_01_sfnt_off0000a5e4.bin
b92fff6b869f887540525332df31e5f9d701e213a4560530330fc02811da4c44
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E4 10212 bytes