Malicious PDF — malware analysis report

Static analysis result for SHA-256 c024640ced3d49d0…

MALICIOUS

PDF

42.4 KB Created: 2020-08-10 12:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 472c2ac5e651500b23bae64e3e639d45 SHA-1: 463decf127e91c0cecebdc02988c0362a18f8a63 SHA-256: c024640ced3d49d0a6c49ba81369696f90a8f0ecc522c043e2de006787fd4ef5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.com/pify?keyword=nsw+school+calendar+2020+pdf', is designed to lure users into clicking it by appearing to be a school calendar. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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=nsw+school+calendar+2020+pdf
    • http://mufufuju.huneremin.com/uploads/1/3/2/8/132814930/gaxokaxajalapaxo.pdf
    • http://files.unanapsychologist.com/uploads/1/3/1/4/131482941/6066797.pdf
    • http://files.cathyscommuniondresses.com/uploads/1/3/0/8/130814466/6147770.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/76356939711.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/pagifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0725/files/dinnerbone_name_tag.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/81408877400.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5041/files/victoria_secret_job_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/clep_us_history_1_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/passion_translation_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0429/0894/2499/files/vawivimolutofonaguz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuketunaxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2146/5757/files/wufuxelajaripotigovemave.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/difference_between_current_and_voltage.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_off000066ab.bin
7cce040b717555ba56d7c3d23db56b3118bfbe2a3c9ea1230add0dbe43b13d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AB 5580 bytes
font_01_sfnt_off000079bc.bin
b93558692172d710dc9c1d47bda5324164bc1f1d8521b541f4204ac53dd5f1ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BC 10248 bytes

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