Malicious PDF — malware analysis report

Static analysis result for SHA-256 481175b021d92268…

MALICIOUS

PDF

34.5 KB Created: 2020-08-10 21:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bbfd420b159e76196e5ac552d267eb7 SHA-1: f010e2f8427bba5839d8960b062823d6753cd998 SHA-256: 481175b021d9226838350a733dea649bb03ee159594948db3d0c6b2d713c5a73
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to other PDFs hosted on Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=aprendizaje+cooperativo+en+las+aulas+juan+carlos+torrego+pdf', redirects to malicious infrastructure. This suggests the document is designed to lure users into clicking malicious links, likely as part of a phishing or redirection scheme.

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.ru/pify?keyword=aprendizaje+cooperativo+en+las+aulas+juan+carlos+torrego+pdf
    • http://files.valenty.com/uploads/1/3/1/4/131453060/80faa4ad2c7f.pdf
    • http://files.thedancehallacademy.com/uploads/1/3/2/3/132303189/fugigu-lisavaxudujutoj-wasidepebid.pdf
    • http://zomexebu.ridgeviewonline.com/uploads/1/3/2/6/132682646/gajiti.pdf
    • https://cdn.shopify.com/s/files/1/0437/5301/3409/files/wenujib.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/demeselolizomanenozub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/82199115642.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4260/files/kikotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/gegowamo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/dinexizur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/mawar_hitam_candra_malik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/ravavadejut.pdf
    • https://cdn.shopify.com/s/files/1/0440/7151/8373/files/lasaxijudatevul.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/rigimamutovarubek.pdf
    • https://cdn.shopify.com/s/files/1/0444/1980/9447/files/all_information_about_badminton.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_off000046b7.bin
420ac3651903dbdaab0498cc35b364dd4a6f27944b04e58b48826d1cbbe014ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46B7 5500 bytes
font_01_sfnt_off00005982.bin
fd163d0e9723f779c446456c5f77b9b250db4d39d7d7e035853ed9f89c6495f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5982 10220 bytes

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