Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f9e28cb496e31e…

MALICIOUS

PDF

54.2 KB Created: 2020-08-10 02:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c373e52a47c5721de232e7f79f456fe SHA-1: ea8c64ab1f7c80a3648f1fed11e6631c5ce4c941 SHA-256: d6f9e28cb496e31ebb92bf7b9dfc8aabe4e4b7f862a623e27f3302bad1a32ed3
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to 'equivalent fractions worksheet 5th grade pdf' and includes the malicious URL. This suggests a phishing or scam attempt using a lure of educational material to drive clicks 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=equivalent+fractions+worksheet+5th+grade+pdf
    • http://files.stephaniemclaughlinart.com/uploads/1/3/2/7/132740905/zurujoj.pdf
    • http://files.rustypistolsreloaded.com/uploads/1/3/0/8/130874253/wituled.pdf
    • http://files.purdiewood.com/uploads/1/3/0/7/130740375/gokela.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/muwogupulitexitozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5637/files/adjective_and_adverb_phrase.pdf
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/73031379814.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/44926635281.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/vepitagoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/jorifuxepimaguminel.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/25496473478.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/50155302802.pdf
    • https://cdn.shopify.com/s/files/1/0438/4020/9056/files/17042639993.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/24379010356.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008078.bin
29227e136074b9a8eb01824a32b68c2972a6c26eb4e2bd2cd36e1a29d53eee10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8078 5840 bytes
font_01_sfnt_off00009473.bin
9b103380116bccfcbca692c5f4f3b5914a8e898d3f019d8ba2cb37e46fb800ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9473 9712 bytes
font_02_sfnt_off0000b5f4.bin
4a83d890a47edb08c66ed977e452dfc2aca54227ac21f6fa21ed0d0aaea40951		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F4 16116 bytes

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