Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2bf38ccb81b787…

MALICIOUS

PDF

120.6 KB Created: 2020-08-29 20:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aff0246de1ba5322cd6332ef81026717 SHA-1: 3a0c41f94d97a6218e1a1a91c053e2319011925c SHA-256: 8f2bf38ccb81b7874895f8a1f5a06658ade4ccc459b41012c049ef13eefd82e3
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One critical heuristic identified a link to a known malicious redirector at ttraff.com. This suggests the document is designed to funnel users through a series of links, potentially leading to malicious content or phishing pages. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=magical+investigation+of+meridiana+console+commands
    • https://static.usrfiles.com/ugd/b8c837_741b7f6a61d14d2093375e09dc85b30b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0456f83b53964426a41325bac41d8f95.pdf
    • https://static.usrfiles.com/ugd/b8c837_f16d3cd835f8488aafe8e3267766a5b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1dd12f2921e4ba1bb4d86d1fff3773f.pdf
    • https://static.usrfiles.com/ugd/b98abb_e83939ced22f448cbb36632b080b57df.pdf
    • https://static.usrfiles.com/ugd/b8c837_550f68f02b6f4b3cba9e291ed6ac1e45.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d2c8329fb094d4db01d7011dc740726.pdf
    • https://static.usrfiles.com/ugd/429b25_06dfaf5b36de421db5f53da6b322bf77.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/32849863959.pdf
    • https://cdn.shopify.com/s/files/1/0435/8550/3393/files/72971111103.pdf
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/62008874931.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/pamopikatinitetinegen.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/kimuwasovemuxefodekuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/31933344495.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/antologia_literaria_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/reset_winsock_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/malcolm_baldrige_award_criteria.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/argumentation_musterlsung.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_off00019afc.bin
0847ea76d343a0aa48817323788160c8c7b0d1acb037285ebbc3412ca62380c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x19AFC 5408 bytes
font_01_sfnt_off0001ad51.bin
3a7b7573348e198de4405fe84592da6d7d706fcf87cdd525d14f5d4adef332c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD51 11524 bytes