Malicious PDF — malware analysis report

Static analysis result for SHA-256 f309b2d426e12678…

MALICIOUS

PDF

39.0 KB Created: 2020-08-19 02:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4905946a155d7c6a07e7891236245ae5 SHA-1: 321832870dc692a733a9a42ca6e28a65f478bad6 SHA-256: f309b2d426e1267825d5e6e503904e9667db4aebafba69891f57c3ea25332453
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to the embedded URLs, suggesting a lure to external content. No scripts were extracted, and the primary malicious activity appears to be link redirection.

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.ru/pify?keyword=add+reminder+google+now+launcher+apk
    • http://files.apwcsa.ca/uploads/1/3/1/4/131406749/rivusarezezali_goxipuxuxe_vipod_xavulubu.pdf
    • http://reseka.aroosterstale.com/uploads/1/3/1/3/131398455/gikuxukifotidav.pdf
    • http://juwuzuke.hannahviera.com/uploads/1/3/0/7/130776407/gavowime.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/gopilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/finimoxokaxakupapewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4606/0710/files/wexisewizipiputiwabuzuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/81276469792.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/zimisogubamunavakotekex.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/pavinili.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/mufemu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7021/0716/files/manageengine_application_manager_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/18361617162.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/1297997023.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/2308379145.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_off00004ca8.bin
0a64dc78b9e9822f8c5cdb4cc8b020f922e5693bfb675af01150e15e754138cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA8 5256 bytes
font_01_sfnt_off00005e54.bin
9a784acc60039ae7b98e67d4187b9b96f35879ea082b6a42e486c77c91a2b566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 10188 bytes
font_02_sfnt_off0000811c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811C 4324 bytes

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