Malicious PDF — malware analysis report

Static analysis result for SHA-256 4107bf7d5fa17ddf…

MALICIOUS

PDF

41.5 KB Created: 2020-09-04 05:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77568fc4840bc2f3a694fd7667016a05 SHA-1: b678798315386cc2814ff085b5b0ad0fe7418118 SHA-256: 4107bf7d5fa17ddfca788f9f2cc6cb4c8ecbabe60aaffc4b73bb3e02c44fa18c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=cdc+vaccine+information+sheet+influenza+2018'. This URL is presented within the document body, disguised as relevant information, to entice users to click. The file also contains a large number of embedded links, many of which are to external PDFs, suggesting a link farm or redirection strategy. No scripts were extracted, but the primary malicious activity appears to be social engineering via a malicious link.

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.me/wix?keyword=cdc+vaccine+information+sheet+influenza+2018
    • https://static.usrfiles.com/ugd/b47706_7558a3d247fd438085b19f5e679f21ec.pdf
    • https://static.usrfiles.com/ugd/6f9b04_311f0cd1619e4acd8aa39fd367731acf.pdf
    • https://static.usrfiles.com/ugd/eed56f_2b2377c0742740da83f1011522a6305a.pdf
    • https://static.usrfiles.com/ugd/f09a9d_909b3b702ee5475f85083e97383c6a8b.pdf
    • https://static.usrfiles.com/ugd/99a8f2_de14ff7281ff4c2f83f7ffa3498ea4a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab181c78135d41809a4d3d37dd25602a.pdf
    • https://static.usrfiles.com/ugd/7921d2_47f740840e3e46cd9e1ab30abbe86016.pdf
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/calibration_of_temperature_transmitter.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/best_nintendo_ds_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0451/3293/9417/files/siseferob.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8791/files/kibajulitonolusudemowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8153/1541/files/ovc_online_video_converter.pdf
    • https://cdn.shopify.com/s/files/1/0437/4501/8017/files/12465491649.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/88269517672.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/kimowanurixinowomisazoba.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_off00006444.bin
83012ec64591c091471d72dd0ddfb0b714b36f8df17ce3e592ca41001f793e36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6444 5796 bytes
font_01_sfnt_off000077e3.bin
e380c70233088b6d01e0cc140daedf688eddb1df1e304878a5d47b39029dd923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 9736 bytes

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