Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9935029c8790ef1…

MALICIOUS

PDF

43.8 KB Created: 2020-08-20 12:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08db53573939886c467d7d0022270794 SHA-1: 597944137f6c9c412f475c2363c43e05737d325f SHA-256: b9935029c8790ef1112407e49440cdc433c5adb8488807b46f61892c1e241f03
128 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple PDFs hosted on Shopify, likely for SEO poisoning or to obscure the malicious redirector. The primary malicious link, https://ttraff.cc/pify?keyword=flail+chest+management+guidelines, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and references to other PDFs, reinforcing the lure. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a phishing or social engineering attempt.

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.cc/pify?keyword=flail+chest+management+guidelines
    • http://numikusa.heartofwellbeing.ca/uploads/1/3/1/8/131856185/c7828efaff.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/bolipuvib.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/wopoxujotopofak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suxuteregejo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/koxozuvari.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/nomozebovawawuzasilorafij.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/18715296208.pdf
    • https://cdn.shopify.com/s/files/1/0434/7484/5858/files/49996901102.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/roworobolufokik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/jonikasokabefelit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51686393220.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/polyclonal_and_monoclonal_antibodies.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/84131564619.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_off00006e0a.bin
84959949b4269c613e2cc9c81f5dd602bd0259d0d30ad9ff5b3001c3ae87a39e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0A 5212 bytes
font_01_sfnt_off00007f9e.bin
ebbe42746b5401cb77a848d7da999811f036d1a32619a17a5114bd17db19c502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9E 10240 bytes

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