Malicious PDF — malware analysis report

Static analysis result for SHA-256 22baaba0d1dcaa5c…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 04:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3512c068083f3b607b82a1388687055 SHA-1: ca5d70ea65da1070853f7b59e7945c09fff63ee3 SHA-256: 22baaba0d1dcaa5cc33882bacd487b880441c67caf4632790943d08a0ac74a56
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as nutritional information, aiming to lure users to a malicious site. The PDF also functions as a link farm, pointing to multiple other PDFs hosted on Shopify. The ML classifier strongly indicates maliciousness.

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=nutritional+information+starbucks+chai+latte
    • http://files.mistoyo.com/uploads/1/3/0/8/130873718/2630512.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/xapek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezaneseku.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/34914341754.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/telecharger_logiciel_des_journaux_algeriens_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/xolisolojilurig.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/zexebijuzamibuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/79907191503.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3733/files/gozasasobomometaxaru.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_off00005532.bin
c22847746b837ba4408cc6685b1917c2aa1be90e09c4e35432820dc17068916f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5532 5176 bytes
font_01_sfnt_off000066a0.bin
27355655e26435f75bc8a34be026c79f1aa8196244dd1c1d77ea854ee3727e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A0 11628 bytes
font_02_sfnt_off00008d1d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1D 4324 bytes

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