Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f8d111aff4ec28…

MALICIOUS

PDF

44.1 KB Created: 2020-08-23 19:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a14b62b7897783d0c4eebe8b4f4cd572 SHA-1: 438652daed407a200757d73a8a84c203986e8268 SHA-256: 52f8d111aff4ec28eb80dc2190cde802a292f282fc648535a4b148daabfdb71e
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or redirection attack designed to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a harmful site, likely for phishing or malware distribution.

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=pokemon+trading+card+game++mac
    • http://pesogiw.jossavate.com/uploads/1/3/2/3/132302995/7742623.pdf
    • http://files.pukalanicommunity.com/uploads/1/3/0/7/130776308/jutafozewupu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/newspaper_template_ks1.pdf
    • https://cdn.shopify.com/s/files/1/0446/3663/5299/files/mailbox_css_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/0071/7727/files/numutetem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92588710477.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/8786160910.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/classification_of_feedback_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/beta_oxidation_steps.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5472/files/49608976852.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/42434040469.pdf
    • https://cdn.shopify.com/s/files/1/0428/2033/7831/files/kalnirnay_calendar_november_2020_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.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_off00006122.bin
9a7d914ffc10f2fa268d36648f248e0d7678aada6842d18272cb6add2244f739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 4900 bytes
font_01_sfnt_off000071a7.bin
35cd2a95fbc2b991a4f044e3facb62fdad76b3885463271c4cd8fd54abc0d87e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A7 10552 bytes
font_02_sfnt_off00009558.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9558 4324 bytes

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