Malicious PDF — malware analysis report

Static analysis result for SHA-256 a312a56d2d320e58…

MALICIOUS

PDF

43.0 KB Created: 2020-08-16 20:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 267fb0f744cc5fd8c45030e48034a0cb SHA-1: 8f065270126f5bd607f690609ef8ea901139ac01 SHA-256: a312a56d2d320e582446657a9c7e403b99d356c74591f18aece97ce66c455434
130 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'recruitment application form' and embeds multiple links. One of these links, 'https://ttraff.cc/pify?keyword=cantonment+board+chennai+recruitment+2018+application+form', is identified as a malicious redirector. The PDF also hosts a link farm pointing to various PDF files on cdn.shopify.com, with one of them being 'https://cdn.shopify.com/s/files/1/0434/2808/5912/files/wopedoxuwuwerijuf.pdf'. This suggests a phishing or social engineering attack aiming to redirect users to malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=cantonment+board+chennai+recruitment+2018+application+form
    • http://files.almabryantyearbook.com/uploads/1/3/1/4/131453615/8281207.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/wopedoxuwuwerijuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/nezolebizide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/12733671679.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1073/files/50026743141.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/99037523808.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/64900626807.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/nadofiniduzonisosifigi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/accounting_and_finance_terms_and_definitions.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/ramekixopepewa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/83042384762.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068af.bin
e9d5c24d60f4f0e8a4cf4180ef7473cfb59800d2879673ab9a2f70cce07e9df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AF 5780 bytes
font_01_sfnt_off00007c30.bin
c4adb6b98178ebac2518958203f8a667938d704306246d1ec13b1afb0e5b71e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C30 10060 bytes

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