Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfe933cfb4448d7…

MALICIOUS

PDF

77.3 KB Created: 2020-08-14 07:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce316f8dfd39fab310c9668dde82652c SHA-1: 090c823c6d032f09e4804e8900140b15b6027886 SHA-256: 2dfe933cfb4448d7fa7290f957212163aaeeba68013019d1c3e31806b4afc87f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link to a redirector URL that is flagged as malicious, suggesting an attempt to lead the user to a malicious site. The document also hosts a large number of external PDF links, many of which are hosted on Shopify, likely as part of an SEO spam campaign to improve search engine ranking for malicious content. The ML classifier strongly indicates maliciousness.

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/wb?keyword=radiographic%20image%20analysis%205th%20edition%20pdf%20free%20download
    • http://files.orizoncenter.net/uploads/1/3/0/7/130776875/7575179.pdf
    • http://files.lkelliott.com/uploads/1/3/0/7/130776684/fupedisab_vogeguxowodo_xuzevaridibiz.pdf
    • http://files.redwoodvisualarts.org/uploads/1/3/2/6/132683088/nowagunobar.pdf
    • http://files.artofceremony.co.uk/uploads/1/3/0/8/130874566/42b7de36064b9.pdf
    • http://xanubato.psychotherapy121.com/uploads/1/3/1/1/131164250/1295398.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/50455290754.pdf
    • https://cdn.shopify.com/s/files/1/0435/7393/6291/files/49026071170.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9807/files/81980799956.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4314/files/92393568477.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdf
    • https://cdn.shopify.com/s/files/1/0438/7926/8520/files/cheat_codes_for_gta_5_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/jubujetofafobapezapa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/tibodoborugokokusufa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/bifojikatekanavin.pdf
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/74051604330.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/instagram_followers_apk_modded_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0829/4039/files/40520380184.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/13112681459.pdf
    • https://bookscollection21.blogspot.com/?book=0323522815Learn
    • 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_off0000f021.bin
1f45818719166cd8f4c56506444f2da1e3b1040b21a4bd8250b237b9d7a1128f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF021 5896 bytes
font_01_sfnt_off0001042e.bin
6e5cf44344ef7c7ec9728e60196bc4be88483925e6e9d33cb38a396cbd36313d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1042E 10464 bytes

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