Malicious PDF — malware analysis report

Static analysis result for SHA-256 b711a66c921656b7…

MALICIOUS

PDF

45.5 KB Created: 2020-07-26 15:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84aeaf44dde26795666594ca013321da SHA-1: 325307be01ef80c416e967aad7407d914957a615 SHA-256: b711a66c921656b7418a74808d60bfaee264073395c1afa3e81b5603fddb82d4
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, and one critical link to a known malicious redirector at ttraff.com. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates this redirector is used to deliver malware. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further suggests a social engineering lure to trick the user into downloading a payload.

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.com/pify?keyword=utorrent+pro+for+android+free
    • http://files.carpediemshows.com/uploads/1/3/1/6/131606284/palubigawubobomo.pdf
    • http://files.spotlightcoachingdc.com/uploads/1/3/2/3/132303312/minopedodozupo.pdf
    • http://files.cheriejsmith.com/uploads/1/3/1/6/131607103/159503.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rajijabobuzev.pdf
    • https://cdn.shopify.com/s/files/1/0431/2095/1450/files/jodoridavelimuxifuguwatis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0999/0043/files/64314647370.pdf
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/10927551709.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/garewopovevikeguwanal.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/89458469980.pdf
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/varadovukonilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/5552181607.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/66168077.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/fuxesekaxi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/soseguv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2711/1841/files/43644448029.pdf
    • https://cdn.shopify.com/s/files/1/0440/6303/1448/files/tugamizizevadezoged.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_off000075cd.bin
c7eec9933c4d5a640889a1c0111eb9a26b81ab9c83f47bfa0086a12e0eff3ccb
pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 4604 bytes
font_01_sfnt_off00008576.bin
fda5fc996b7c3a9b1553936a4c2d09217a524f5333bf21c7c085159b52faebec
pdf-font-stream PDF embedded font (sfnt) at offset 0x8576 10328 bytes