Malicious PDF — malware analysis report

Static analysis result for SHA-256 3632a08f01868f2c…

MALICIOUS

PDF

34.0 KB Created: 2020-09-02 01:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27c164f9370ad7234d164558db0be7a9 SHA-1: 17c928325bb5885930f2add905c806707efca093 SHA-256: 3632a08f01868f2c619f935ee0bb1a29f6b4c33b9e2684ab4825f926111408ac
142 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=aberdare+park+primary+school+uniform'. This URL is likely part of a phishing or scam campaign. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com. The presence of a callback lure heuristic further suggests a social engineering attempt to engage the user, possibly for a scam.

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.club/wix?keyword=aberdare+park+primary+school+uniform
    • https://static.usrfiles.com/ugd/33c377_461da33ed4984d42a31f5c6142655e17.pdf
    • https://static.usrfiles.com/ugd/0c4177_9ff48ab422834fbc9728024c792a695f.pdf
    • https://static.usrfiles.com/ugd/0779a3_90575c2fa3064e23a5d78034775db9c3.pdf
    • https://static.usrfiles.com/ugd/e2f197_b7071bd6edf84d2b9196170956eb85fd.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/reridujaduwosipodozajexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/10619133839.pdf
    • https://cdn.shopify.com/s/files/1/0471/0642/4982/files/dimensionamento_hidraulico_residencial.pdf
    • https://cdn.shopify.com/s/files/1/0463/4925/4817/files/zokibevusemusilolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/xedenasuduwaxodapev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://static.usrfiles.com/ugd/f65518_7e01fce240c8406998c048064c1a8238.pdf
    • https://static.usrfiles.com/ugd/96bf9d_8455f8c2f29a475f99e6486e0d4caa10.pdf
    • https://static.usrfiles.com/ugd/804ff6_6abe409050a84aa495c9a18985c50e39.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_off00004676.bin
2f96b648324117dedcf13fcb747e6d9ee886570d79fddca89707c42cc498a5fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4676 5688 bytes
font_01_sfnt_off000059ac.bin
3b76ec37de3409de7712d1c851656b9347612040672ffb83836368e18908e95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AC 9884 bytes

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