Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc3c1cf0540ed1d…

MALICIOUS

PDF

40.8 KB Created: 2020-08-15 00:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39fdd15059ac3a1fa2bf0976d3932f08 SHA-1: 18378ea3e2882df2a8f7c16a281d08e1f8e6399e SHA-256: edc3c1cf0540ed1d4c7a2652a7dbdf85096fea94516d4172e008f5ece8dfc39c
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to PDFs hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The presence of a visual download button further supports a lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=rush+losing+it+sheet+music
    • http://files.davidrsmithbooks.com/uploads/1/3/2/7/132740804/dolidugepubuton.pdf
    • http://files.thetadprinciple.com/uploads/1/3/2/8/132814977/fuputulizu.pdf
    • http://nivafavem.interlakesaintsvolleyball.com/uploads/1/3/1/3/131383648/b6c83519c00.pdf
    • http://files.got-hope.org/uploads/1/3/1/4/131438541/tuvisigupunadum.pdf
    • http://files.zcsentinel.com/uploads/1/3/1/4/131408024/4392261.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/guide_vert_michelin_france.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/ez_pass_violation_dispute_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0435/5640/5411/files/zekipewedewut.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2967/files/42542530935.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/thinking_in_java_4th_edition_bruce_eckel.pdf
    • https://cdn.shopify.com/s/files/1/0434/3988/2402/files/81735255785.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/bollywood_musik_video.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/coriolis_acceleration_derivation.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7207/files/reducing_stress_at_work.pdf
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/48617847528.pdf
    • https://cdn.shopify.com/s/files/1/0434/7458/3702/files/xopotel.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_off0000642b.bin
009e4539f3aea89cf306731e609dc04477869ed5c0dd74a14973354bf4f28d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x642B 4916 bytes
font_01_sfnt_off000074c0.bin
1a6b2db01e28ce6dbdf56491426b4c7ea4ad3ce7f2ef599525405b4fa9de8752
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C0 9960 bytes