Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13faa8a96bd0529…

MALICIOUS

PDF

43.7 KB Created: 2020-08-05 14:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54eb09833b1533f1c4d6f609aa258fb1 SHA-1: b69549a63f43b865642447bf6afad6942ab78b48 SHA-256: a13faa8a96bd052928c5373291b5c4dcef9450b3ee578c430d1d891d6c95ff86
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though partially corrupted, includes the URL and text suggesting it is a PDF about quantitative aptitude questions for interviews. This indicates a phishing lure designed to redirect users to malicious infrastructure.

Heuristics 3

  • 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.
  • 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=quantitative+aptitude+questions+with+answers+for+interview+pdf
    • http://files.realmofricketts.com/uploads/1/3/1/8/131856543/jogemo_lipasaxularikon.pdf
    • http://files.perrodisefarmsllc.com/uploads/1/3/1/4/131438018/dojuwol.pdf
    • http://files.kootenaicommunitycentre.org/uploads/1/3/1/3/131398046/1bdc46522.pdf
    • http://files.shodacars.com/uploads/1/3/0/7/130775126/0a2a59f72254.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/damukukaluzilutise.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7145/files/lefudik.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/92093281415.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/derurobo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/ranuzuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/16107390933.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/zubajexadugezewefowaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/botititurinibil.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/61868674176.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_off00005ff4.bin
89289d7cc5cd1ce1671549afdd03342f1bc08d6c8c7eaabe51bd564d6af51918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 5436 bytes
font_01_sfnt_off0000727d.bin
580fad21926941ce92d2c05f58ea67fa041e0856b3a378cb681ec9d57b3348bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727D 14896 bytes

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