Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf3a419480a9242…

MALICIOUS

PDF

39.5 KB Created: 2020-08-24 20:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a7ca57df929687ac257a36cdedbb814 SHA-1: ed463ffe2aaf720dc1a5fde9de83e6d5602285e7 SHA-256: 9bf3a419480a9242dfa4753b08ca40efecd0862e9d4aad23651058218a0bba14
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or scam attempt where the user is enticed to click the link, leading them to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=slope+intercept+form+solving+for+y
    • http://files.barbscozycottage.com/uploads/1/3/0/7/130739747/7306e02d7f1c5.pdf
    • http://files.leadershippasadena.org/uploads/1/3/2/7/132741375/cbcbf.pdf
    • http://xaluz.razajamiamasjid.org/uploads/1/3/1/4/131438428/sagaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/index._php_template_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/thinking_about_dilations_mathbits_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/93970757659.pdf
    • https://cdn.shopify.com/s/files/1/0433/1103/8632/files/91386076515.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/imperative_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/birth_by_sleep_ability_melding_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/vupesitulimanove.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/75186919851.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/baidu_map_api.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_off00005b80.bin
dd430122497c65a9e1deb2d240cd5444189c1a154b10d7d6a10ee3533c92a8a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B80 5392 bytes
font_01_sfnt_off00006dca.bin
dd9c197f594b1e3c10ff9d7b7883fc6ed4daf1bb1fa396005c9967cc3859e837		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 10412 bytes

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