Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c718b3ce54cb71…

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 22:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 184bd34eff762c4143aa054f089bfe3d SHA-1: 21c2063cc6e50520110a034176b591a151d484b1 SHA-256: 25c718b3ce54cb7172a3a6ceede5dd27dfdcb7007bff2b0ae652076fe1b9f35e
160 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for delivering malware. The document body and heuristics indicate a lure for software, specifically 'adobe illustrator cs4 portable kuyha', to entice users to click the link. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious links. The presence of a password-protected archive lure suggests the actual payload is likely encrypted.

Heuristics 4

  • 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
  • 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/wix?keyword=adobe+illustrator+cs4+portable+kuyha
    • https://static.usrfiles.com/ugd/b8c837_1ff2533c4c3f4d0db9f272b2c5c62050.pdf
    • https://static.usrfiles.com/ugd/93c935_4be18deddeae49939ce099055f625dfe.pdf
    • https://static.usrfiles.com/ugd/b8c837_c03faffed8614254822704214150e026.pdf
    • https://static.usrfiles.com/ugd/b8c837_1866dd4e82ba4919bbc9956aab0c2f54.pdf
    • https://static.usrfiles.com/ugd/b8c837_e12bb8e1185a4e12aed3b24582b21acf.pdf
    • https://static.usrfiles.com/ugd/5de1df_65146924c0e843d3be26e9d6a77cbe4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f4278d71d22471597b283dbeea6eddd.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc6dd03b97a1489d91a051f65fcee5ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_854d07ea873f45c381e7c44f16111951.pdf
    • https://cdn.shopify.com/s/files/1/0454/6088/1560/files/zidenuzevinipipafuroki.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/kumutatiwukerawe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2332/files/article_grammar_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/alto_saxophone_notes.pdf
    • https://cdn.shopify.com/s/files/1/0462/9309/0465/files/loreena_mckennitt_sheet_music_free.pdf
    • https://static.usrfiles.com/ugd/f84671_60465454ed1249fea9ed429c0d5f4170.pdf
    • https://static.usrfiles.com/ugd/db1da1_4f683803f058488b9eb70ef938d33247.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_off000061ef.bin
4e62a564de7cdeafa62e25ca3c2376f80b27b853a77d560a958f590b783d80c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x61EF 5544 bytes
font_01_sfnt_off000074c5.bin
215775e36c6e897d628660ab106935939c63e8150b67a903e6feeee13d5669e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C5 13940 bytes