Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3eee4fe2f92c12…

MALICIOUS

PDF

47.8 KB Created: 2020-07-31 11:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ccef3234ac1079d547f0ce6dbbf945c SHA-1: 5383c17fa0036e4229b0e5debec80a4468df3965 SHA-256: 1a3eee4fe2f92c1265a435e8d4373988915bf84176ed703a8d7b4343f5bbca19
130 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, suggests a lure related to a 'mobile phone repair course download pdf'. The primary malicious IOC is the redirector URL, which is part of a known malicious infrastructure.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=mobile+phone+repair+course+download+pdf
    • http://files.shannabutler.com/uploads/1/3/0/8/130814475/3616428.pdf
    • http://files.astonialandscaping.ca/uploads/1/3/0/7/130738548/ba1992.pdf
    • http://files.graciasgreenhouse.com/uploads/1/3/1/6/131636807/mexetaw_milibone_muvowifivido.pdf
    • http://files.juniatacountytroutclub.com/uploads/1/3/1/6/131637362/4272173.pdf
    • http://files.juniatacountytroutclub.c
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/26706221444.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/21390946668.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/foguwukoxumikevuxi.pdf
    • https://cdn.shopify.com/s/files/1/0440/9648/7576/files/xejadajenuzebuzizajaseguf.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/begikexevusifenuridexosos.pdf
    • https://cdn.shopify.com/s/files/1/0435/8189/8913/files/25687867152.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/vubikenusodarofiluvabep.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/89931759777.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/powome.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.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_off00007ce0.bin
a00b272168cf502faef1e8b88fb50535234c3c068d0cbf07d368a8d8d0f45afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE0 5280 bytes
font_01_sfnt_off00008ec6.bin
c707ec670286d031d60e15e5f49d8e81eb304ad9bd0c9962b15f7eaa567a7266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC6 10280 bytes

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