Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45370d5c6d797d5…

MALICIOUS

PDF

49.2 KB Created: 2020-08-05 08:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee10a73b16ebaaaad937f5ff82d5d174 SHA-1: 35e12a6e27e204cb1c4e51fd3ceaa3c982aa33a0 SHA-256: e45370d5c6d797d52f42d3ba744dca23bfc953919469da078d0784cb740022dc
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, appears to contain text related to calligraphy exercises, likely serving as a lure. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms the intent to lead the user to a malicious site. No scripts were extracted, limiting the analysis of specific execution behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=calligraphy+exercises+sheets+pdf
    • http://files.greymatternoise.com/uploads/1/3/1/1/131164310/jedun-sonopezixori-miberadunixod.pdf
    • http://files.neo-hawaii.com/uploads/1/3/0/9/130970003/3616855.pdf
    • http://files.maloofroofing.com/uploads/1/3/1/6/131606222/3093938.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/intentional_fallacy_summary.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/49609114365.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/87900406586.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/bimawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9202/5249/files/28840226552.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4179/files/fomexuruvejubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/56993254090.pdf
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/54064506946.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/jalifubovoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/nypd_exam_2016.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/nakifijaseve.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/tazipijolo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bf5.bin
c78104b30a105c4e9fd5ef9bb2078e63b16a07bb18f4a0341e75d9e757071182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF5 5492 bytes
font_01_sfnt_off00007eaa.bin
710b30a44ca16503f97a79bb98866f4ab051d6dd76a99560895464fc1c9ba807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAA 10304 bytes
font_02_sfnt_off0000a21d.bin
436adf290e28d8bcde392a5520c8c02cd0f3d4d3b96b9e63b958414ec79317f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA21D 16192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.