Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b473de7181c0aa3…

MALICIOUS

PDF

48.2 KB Created: 2020-08-22 16:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b719da29682491a9a9828c3295894fa SHA-1: e0891f390f70c2665e41a66a680c2d56b6d6eded SHA-256: 8b473de7181c0aa33da4fa5cf2f783d3b465d4dc5c13dae60b5854ccc2eab419
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though partially obfuscated, contains the URL 'https://ttraff.com/pify?keyword=aprender+a+leer+hebreo+pdf', which is the primary indicator of malicious intent. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=aprender+a+leer+hebreo+pdf
    • http://files.alsisfunds.us/uploads/1/3/0/8/130874329/175aafac02f74.pdf
    • http://files.rachelchristofferson.com/uploads/1/3/1/4/131437385/476810.pdf
    • http://files.limassolsportsmassage.com/uploads/1/3/0/8/130874129/laxuvovobopekidom.pdf
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/27020938474.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/rikakikanomogijatino.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/sue_bryce_posing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/analytical_mechanics_of_space_systems_schaub.pdf
    • https://cdn.shopify.com/s/files/1/0447/3955/9578/files/comment_fusionner_plusieurs_sur_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/3063/3881/files/kigomaxabux.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/vojonaderewodizejedeka.pdf
    • https://cdn.shopify.com/s/files/1/0436/4173/3273/files/xumanam.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/52825138881.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_off00007270.bin
92e0b8b5da8d01e325c75b073aeaac0815b25fb8c404e4ea79f6bc01c00e96e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7270 5080 bytes
font_01_sfnt_off000083a3.bin
3b1160c79140a0df0f50d957b44b7c3bce30c9155819e2090bc1f4dd6daf1ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A3 15856 bytes

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