Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3441d1106b6f0c…

MALICIOUS

PDF

52.5 KB Created: 2020-08-18 16:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85f268ca7588acefccf682ba7609a080 SHA-1: 87b683cfec8207ba3c01e2cfd5b38464ff75a4b1 SHA-256: 3f3441d1106b6f0c14aa40f49c85bf6397f5d4658cb7fde3bb00cf16f47a0fe6
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as free PDF downloads, but the primary link redirects to a malicious URL. The document body contains obfuscated text and the initial redirector URL is confirmed malicious. The file leverages a common SEO-based PDF lure to drive traffic to malicious infrastructure.

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.cc/pify?keyword=os+axiomas+de+zurique+pdf+gratuito
    • http://files.princetonmeadow.com/uploads/1/3/0/9/130968961/gujumigajaruj_fozafawevazawan.pdf
    • http://files.walleycreeknanaimo.org/uploads/1/3/1/0/131070560/5150796.pdf
    • http://files.walkaboutjesus.com/uploads/1/3/1/3/131381720/14f92a.pdf
    • https://cdn.shopify.com/s/files/1/0434/2526/7877/files/8281420963.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/nopasenefijarunos.pdf
    • https://cdn.shopify.com/s/files/1/0433/7670/5690/files/wexipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/rocket_league_png.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/35641917976.pdf
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/xixukoxojijetuwerapevag.pdf
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/lake_ouatchta_fishing_reporg.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/jegagepubipurunisal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tokavurovapipemekimisam.pdf
    • https://cdn.shopify.com/s/files/1/0437/2443/9717/files/iowa_state_football_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/menijez.pdf
    • https://cdn.shopify.com/s/files/1/0451/7930/6135/files/convocatoria_beca_de_permanencia_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/kipadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/how_to_draw_a_christmas_tree.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_off00007a58.bin
83c003e44dada6f50bc862a80c5f03c79783d2aeef3d84c8582a54cbe3c5bec6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A58 5376 bytes
font_01_sfnt_off00008caa.bin
258bb8ae1147632f50baa360348ca78125d04da0a2c4299677d460173a6a0b0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAA 13028 bytes
font_02_sfnt_off0000b4e2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E2 4324 bytes