Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb65777a9e284e7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 20:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eea87ed4c6aa2d10e80a8eacc92879a SHA-1: 235cd72f310d639023040061493bac0b4097c0ad SHA-256: 7eb65777a9e284e7b6a5a9a4b1d769d4f01e2c3a190d7cdd0a3fcc335d2a57de
168 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. The presence of a 'password-protected archive' lure suggests the document is intended to trick the user into downloading and decrypting a malicious payload. No scripts were extracted from this sample.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=corel+draw+x7+kuyhaa+android
    • http://files.cfandtg.com/uploads/1/3/2/7/132740485/xulod.pdf
    • http://files.changedbythomas.com/uploads/1/3/1/1/131164398/lelipivo_favuxixa_lilifobez.pdf
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/tedoxupalom.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/calculus_derivatives_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9777/4497/files/nososigu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/48731303511.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/job_advertisement.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/cub_cadet_ltx_1045.pdf
    • https://cdn.shopify.com/s/files/1/0432/8534/8510/files/gusodidevedagovisuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/4664/7446/files/zotexakadafenanabapujesod.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/epilepsy_in_pregnancy_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/bored_in_adjective_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/6289/3471/files/62353171993.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/33769540422.pdf
    • https://cdn.shopify.com/s/files/1/0439/5981/2254/files/bujina.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_off00005e7e.bin
93626aac1b1f99f6956a13c9d36638e794990fcb47a82cb677602fe11447f597
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7E 5044 bytes
font_01_sfnt_off00006fbe.bin
1eda465c439119b79364970afa0f6f6382aec836b0803b2319fc3266f57e2af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBE 10360 bytes