Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1444306b5a20ac…

MALICIOUS

PDF

33.3 KB Created: 2020-09-01 08:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa6960850b8ba7ffd1b86d25a0420281 SHA-1: f4ee7fd823874ecc19d227c921e8641cdedab1de SHA-256: 1e1444306b5a20ac07d68ccae23375716dac0b99feabb54c1c210d7f0b07d75f
150 Risk Score

Malware Insights

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

This PDF file contains a heuristic firing for a malicious redirector link, pointing to a URL that mimics a search result. The document body, though heavily obfuscated, contains the same URL. The PDF also contains a link farm heuristic, indicating it's part of a larger SEO manipulation effort to distribute malicious content. The primary malicious IOC is the redirector URL.

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/wix?keyword=noetic+learning+problem+of+the+week+answers
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/situjuvoporafonetelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0725/4421/files/netopijofavivunufow.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/oral_route_of_drug_administration.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9445/files/sivogerefimozuzomiluze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/abdul_karim_soroush_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/jebipajifibe.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f9e3cc8fca1437bb4a68dfac41caea2.pdf
    • https://static.usrfiles.com/ugd/6f53d7_82ababeff3b44e7a9a11e6f22eb040de.pdf
    • https://static.usrfiles.com/ugd/735424_952c8a9d49824adfbc61eae8e6078d37.pdf
    • https://cdn.shopify.com/s/files/1/0432/2043/5112/files/vaxutituvixax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/81044453056.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_off000043ec.bin
10cec89cfbaa5c8fdde21d0a794ef344ceb7e183dac942a0347090841789f762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43EC 5692 bytes
font_01_sfnt_off00005738.bin
f5578549266fed9291d10451ad9da0601b9dad0941bb727be02aa018e9fd5ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5738 9784 bytes

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