Malicious PDF — malware analysis report

Static analysis result for SHA-256 226c13627e711e1d…

MALICIOUS

PDF

54.2 KB Created: 2020-07-30 12:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5283bb5477de675c91f3dd3a48c025a6 SHA-1: 3a7b48b8cd016058c693c30f0c068198790df3f9 SHA-256: 226c13627e711e1d5d70ab4fcbc5a44306bd22f511ca85c4f0d1721f9149e86e
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains commonly used in SEO link farms. One of the primary links directs to a known malicious redirector, suggesting an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains keywords related to 'computer architecture and organization pdf', likely a lure to attract users interested in such content.

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=computer+architecture+and+organization+pdf
    • http://files.elm-designs.co.uk/uploads/1/3/0/7/130775245/ae845d5ac9.pdf
    • http://files.mymerits.org/uploads/1/3/2/6/132695915/b65666da09.pdf
    • http://files.andyjacksonconsultants.com/uploads/1/3/1/4/131437131/8370288.pdf
    • http://files.graffitiwgratitude.com/uploads/1/3/0/7/130738814/808e7b1556b9ad.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/50910172147.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/dajujaforikinikuzasuwuraw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/92787337703.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/10966238513.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37278413385.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/27980661317.pdf
    • https://cdn.shopify.com/s/files/1/0432/5680/7586/files/90549022385.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/juwirimid.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/gikanapurasirelewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/pofujid.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/92974316863.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/kubolixevutiwudofamoj.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_off00009647.bin
3ad4d6c50e3d388f94447485a94f0ed0240cf6492919bc45ef9f8b49d0edacb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9647 5312 bytes
font_01_sfnt_off0000a83c.bin
626543dbce8b417b3c99cb3bba88603c9b7bb719fd93f90ed712476e80f58c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA83C 10340 bytes

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