Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f77e56072833449…

MALICIOUS

PDF

47.6 KB Created: 2020-08-30 21:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71e9a852c43a25a189f508233bfd744d SHA-1: 48c23e52ab869314ecfb5fbf5c2eb0058f3cbabd SHA-256: 8f77e5607283344904498cb1916441305861066d58d2dc04ba727b76efd0a521
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though partially corrupted, contains text related to 'Kostenlose leere Schuldschein Vorlag' (free blank promissory note template), suggesting a lure. The PDF also contains a mass external link farm, with many links pointing to Shopify domains, but the primary malicious indicator is the redirector URL.

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.club/wix?keyword=Kostenlose+leere+Schuldschein+Vorlag
    • https://cdn.shopify.com/s/files/1/0437/3816/9498/files/40090349231.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/nimunorepi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/2007_toyota_highlander_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6527/files/beamer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/7859321899.pdf
    • https://cdn.shopify.com/s/files/1/0431/1174/3639/files/98876352775.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/english_grammar_in_use_present_simple.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/16138825420.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/android_pie_font_magisk_module.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/1235973502.pdf
    • https://cdn.shopify.com/s/files/1/0431/0853/2380/files/el_juego_de_ender_pelicula_completa_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0428/5448/2079/files/btec_level_3_ict_revision_guide.pdf
    • https://static.usrfiles.com/ugd/ee4a13_fef355f88f9840c0888e50f054756eb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b01b54efad984754a2f8fd1c8321ce2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec8fa0036ef7465ea804f506bcd2eca4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebaebab9db8e494c85fdf9b5bd3c9800.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_off00006efe.bin
eeab2bc9035d50435caa49bf9bc4dd85ecc508e81b2ab8cd97151bcd19524096
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 5428 bytes
font_01_sfnt_off00008172.bin
9b3a8af22d4fd10ab6c6ae004b5f21eaa1a1e811dbc2e00af4cb0d6af887f360
pdf-font-stream PDF embedded font (sfnt) at offset 0x8172 15016 bytes