Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71201823aa91f48…

MALICIOUS

PDF

37.8 KB Created: 2020-08-30 05:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a039f84312c7ad0ff621c64420b6d4ee SHA-1: dbfb8bd095f4b74ce766d6a80599a47980a7b6df SHA-256: a71201823aa91f48b4e67289a75fd510a578e32c27569b4ae38577880d4ce179
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised with a keyword suggesting a free movie download. This indicates a social engineering lure to trick users into visiting a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=cheaper+by+the+dozen+2+full+movie+free+download
    • https://static.usrfiles.com/ugd/a18aa6_7ab0d6ae593f470182b023fd9c616d70.pdf
    • https://static.usrfiles.com/ugd/3f80ec_15be43315c7649dd801faa5af73fe71a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c558f0fe94124d7e8cb83514f51fbdba.pdf
    • https://static.usrfiles.com/ugd/b8c837_87458f3efb3744c78231bbfa0f50a625.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/zonafad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/balanza_de_pagos.pdf
    • https://cdn.shopify.com/s/files/1/0459/6318/2247/files/nalufolud.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/45606728729.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/jexapovulilanofasidek.pdf
    • https://static.usrfiles.com/ugd/3f0e57_97fa71210336477e9dfb326a3b83b1ff.pdf
    • https://static.usrfiles.com/ugd/353d00_e1f42ea117de4dc98da4475777622268.pdf
    • https://static.usrfiles.com/ugd/0d9a50_a4f79f13017d4542ac8f3f3e366a8f26.pdf
    • https://static.usrfiles.com/ugd/432b07_c53313f1a3cb4e97a8cc9417b7ef4a15.pdf
    • https://static.usrfiles.com/ugd/a31856_75b480ddbb774a0386447bb8bb6ef04f.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_038760e40ac24cc3b0dd08541c341870.pdf
    • https://static.usrfiles.com/ugd/c6ac46_33bf33a6d32c4d70a3e76a515cfd470a.pdf
    • https://static.usrfiles.com/ugd/a467d2_cc9c2fcd7d7f431185c130d5d063fe0c.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_off00005363.bin
8248ab798a31d6648827d31babe2ba35d4bff7cc9671abb7701fd43559cfe2ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5363 5584 bytes
font_01_sfnt_off0000664d.bin
ab9b920253c27548f650bf838080181ae35e2cc440c326dfac81bcf7d41eeae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x664D 10412 bytes

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