Malicious PDF — malware analysis report

Static analysis result for SHA-256 6286c95e2a0dbf5c…

MALICIOUS

PDF

54.4 KB Created: 2020-07-12 05:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67dfa9f5e0796d69616c6ea160f2299b SHA-1: ff2856c2a3686566d3a9cf2ce6fe9b5388e44713 SHA-256: 6286c95e2a0dbf5cd954bcfce369fbe27733e62cbae1b17aaf89d059a7528dce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised within content that appears to be a guide on illicit drug manufacturing. This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment. The ML classifier strongly indicated maliciousness, and the presence of numerous external links further supports a malicious intent, possibly for SEO manipulation or traffic redirection.

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=how+to+make+freebase+with+ammonia
    • http://files.groveislegardenhomes.com/uploads/1/3/2/6/132682329/3725621.pdf
    • http://files.radscalems.com/uploads/1/3/1/4/131437225/aa350934.pdf
    • http://files.bhumikafest.com/uploads/1/3/1/8/131872105/vuzobola_xepasikaru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/84141674354.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pitoparejiki.pdf
    • https://kifevaji.files.wordpress.com/2020/07/fomogigafivo.pdf
    • https://vafegavajip.files.wordpress.com/2020/06/25092820463.pdf
    • https://dukidowa.files.wordpress.com/2020/06/zuxeronizizuzotifevafusu.pdf
    • https://vumemifi.files.wordpress.com/2020/06/32729205267.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/todexinugujelapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/26860832677.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/93896805264.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7721/files/37603224552.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/torowowuxeveb.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/sofabewijelomotasaliwosi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097eb.bin
eae8c1421b1820cbcbd1b7c4899afdd21a9038f7a67d17bc2256b5ec27c975ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97EB 5020 bytes
font_01_sfnt_off0000a8dc.bin
18ba4f03e7b9c87b4301ac7e1bceedf6c580fd100c28956a228394a3680b7311		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8DC 10440 bytes

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