Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2fb3550e83ef6f…

MALICIOUS

PDF

59.3 KB Created: 2020-09-01 21:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94407fde9a8f7862cb8517ed04650d07 SHA-1: 5e5ee80611b34ecd6a8eb294eeba1c18b782fc4e SHA-256: 3a2fb3550e83ef6f69c94634f03191faaace1df2fb25d44e96bb72bdec979d6d
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=cdc+flu+vaccine+information+sheet+2018'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links hosted on static.usrfiles.com. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The combination of these factors strongly suggests a phishing attempt designed to redirect users to malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/wix?keyword=cdc+flu+vaccine+information+sheet+2018
    • https://static.usrfiles.com/ugd/0e9fc2_ce6b05659cd140179d0b530f54eba4e0.pdf
    • https://static.usrfiles.com/ugd/d54300_321c7db734424c74a60815be53aad045.pdf
    • https://static.usrfiles.com/ugd/a107db_72845831676a47ecb54b4a44897fc1ea.pdf
    • https://static.usrfiles.com/ugd/d99ef3_5cc2f781d2a24293bc4f528df9c8f24c.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3718/files/baby_beanie_sewing_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/94915375770.pdf
    • https://cdn.shopify.com/s/files/1/0433/7241/3079/files/letadasuligojazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuvinotagug.pdf
    • https://cdn.shopify.com/s/files/1/0433/8388/1893/files/berlin_conference_1884_primary_document.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5f6dfe210794c2e96f1f9578585724d.pdf
    • https://static.usrfiles.com/ugd/67e251_c7bf0b8288ba49c68d07689e5263476f.pdf
    • https://static.usrfiles.com/ugd/c1108c_c89d5c9fe0824f01b0f118b3e3b839b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_196c6694c5074fdab78e83b1d9110e4f.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_off0000aa52.bin
22950930329ea213014d9f94ff0b66456199ff17f7d878b4dcf961c97a134804		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA52 5744 bytes
font_01_sfnt_off0000bdba.bin
0e6215cbcade5781bf512824575a899c0717303467ec26536a80ffbcb0654b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBA 10060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.