Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc5fe3f364893ac…

MALICIOUS

PDF

72.2 KB Created: 2020-08-29 21:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c797acfdb14691877a2993fa602bc21c SHA-1: 38905d4948deaabcccd23c23be0ec2bef70c59fd SHA-256: fbc5fe3f364893ac934bcd0ae90ef726a454bcf69a811cb8a1b480cd0af41744
140 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a financial accounting PDF. This heuristic, combined with the 'SE_CALLBACK_LURE' finding, suggests a phishing or scam attempt. The document body, though heavily corrupted, contains the malicious URL, reinforcing the attack pattern. No scripts were extracted from this sample.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wix?keyword=issues+in+financial+accounting+16th+edition+pdf
    • https://static.usrfiles.com/ugd/bb13a2_a173d202f95049e88e220b1eb120ff74.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17292eb6db1468bb6f5aa040c921649.pdf
    • https://static.usrfiles.com/ugd/f09a9d_b317809fa23447619bb1a7e2edc5043a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a1bec67214c41a7b49445864f8a60dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bdbf7180a6c481d87535813312690e8.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/pajakuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/addatimes_web_series.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/11958508868.pdf
    • https://cdn.shopify.com/s/files/1/0434/3362/3708/files/wosifaviseji.pdf
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/79668497602.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/carpenito_nursing_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/juzixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/gumurujoxivazasorixuxa.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_off0000dc0c.bin
c8ee0e0d5bd5b883f55bb5a12d59be34bff98e3b8383162b093e5789ba7c3a98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 5464 bytes
font_01_sfnt_off0000eea0.bin
2655bb65cb36a6f2e262877671f7f384fb9589eb72e27429eff1d539095cb093		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 10852 bytes

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