Malicious PDF — malware analysis report

Static analysis result for SHA-256 528e640855bcd1d0…

MALICIOUS

PDF

37.5 KB Created: 2020-08-21 19:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2d7d859721085d5c578a1bda015c6dd SHA-1: 1e9cef80df4860ef4e486ad56aad4d3d0d013616 SHA-256: 528e640855bcd1d0d771293dc68c57b2ba17b6efb2cc3ca8eb706a62d6ec6c26
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, forming a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cyclotron+project+report, which is likely used to redirect users to further malicious content. The document body itself appears to be obfuscated or corrupted, but the presence of numerous links points towards a delivery mechanism for phishing or malware.

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=cyclotron+project+report
    • http://files.goochipoochi.net/uploads/1/3/1/1/131164076/bejorifojufeb.pdf
    • http://jopizuwuw.sexladykaty.com/uploads/1/3/0/7/130738848/4970832.pdf
    • https://cdn.shopify.com/s/files/1/0438/8087/4139/files/losapunaju.pdf
    • https://cdn.shopify.com/s/files/1/0430/6318/1473/files/jojifapokudawita.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15636630427.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jerozex.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/temofesavitisusala.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/61345485618.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/bhagavad_gita_stephen_mitchell_free.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_off00005820.bin
a594e5e74a4e0c6cae0998fbea728f4ca3cdcfce8d1b5b4d965642b40584d6e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5820 4620 bytes
font_01_sfnt_off000067ed.bin
0f40dc16a326b9da6f650e5fc252a37aedd19c92b6661d260369c010f8012025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67ED 9948 bytes

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