Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cc339c95d27f03…

MALICIOUS

PDF

64.2 KB Created: 2020-08-02 03:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d29b5606fa3e401efbaeb4edd9d7514 SHA-1: 43f39803d2f665e357cec62c26bdde09e12aaf9e SHA-256: 94cc339c95d27f03b6231aded1ced1e9fd74062d81c0aec962045c4ced51d074
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for phishing and malware delivery. The document body, though heavily obfuscated, contains text related to 'Nys corrections officer exam 2017' and a URL, suggesting a lure to trick users into clicking the malicious link. The presence of a link farm further indicates malicious intent.

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.com/pify?keyword=nys+corrections+officer+exam+2017
    • http://files.tekesintidewater.com/uploads/1/3/2/7/132710795/rosudofaf.pdf
    • http://files.wangnaumannlab.com/uploads/1/3/1/4/131482822/mimapeg_xaranewotef.pdf
    • http://files.carnivalcandlecompany.com/uploads/1/3/1/4/131437484/42bc50fe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/fesedovivodepuxaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/gugurabipazavopoze.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/vertaloc_back_brace.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/62492591074.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/nixofisaviganafodifexovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/pizozumimajepitarimozev.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/fifowepaburuwevatineke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.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_off0000bc16.bin
7727d7cdce042a53dea5a9d8c28ffe90863d49a4ee440ba3ccbdb48d7c32f249		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC16 5540 bytes
font_01_sfnt_off0000cefb.bin
34e1cf056b9e329906d30a48b72fd18e79d512ee405f14cd3528a9d55e3000be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFB 10984 bytes

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