Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebad8bbbd9d683ba…

MALICIOUS

PDF

39.1 KB Created: 2020-08-11 21:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ba0036ffcd8b77f0e593efa5fbc7548 SHA-1: 4106a9575bed755a13ab4c8f7fed243129319f4a SHA-256: ebad8bbbd9d683bac3a66079ce1c3c10236b4a7da7273a5639177cb88caf45a5
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body text, though partially corrupted, includes phrases like 'Atkins quimica pdf download' and references to 'wkhtmltopdf', suggesting a lure for users seeking specific documents. The presence of a link farm and a malicious redirector indicates an attempt to lead users to malicious content, likely for further exploitation or malware delivery.

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.cc/pify?keyword=atkins+quimica+pdf+download
    • http://files.jilliangallays.com/uploads/1/3/0/7/130739376/eacee7e3.pdf
    • http://files.anandahairlounge.com/uploads/1/3/0/7/130739284/8b679fe1c.pdf
    • http://files.justrightkennels.com/uploads/1/3/2/3/132303020/9613866.pdf
    • http://files.christcommunityonline.net/uploads/1/3/2/8/132815882/6299851.pdf
    • https://cdn.shopify.com/s/files/1/0434/9086/9410/files/96364329717.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/25727154853.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/53341213184.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/65407077468.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/xekitilirusajugenepuful.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/java_programming_language_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/98372162056.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/paulus_alexandrinus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8635/6375/files/gidaluj.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_off00005872.bin
9057f298077d7a21406795e9c44d53c6f03326631ca05f37a897bfea7c6730ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5872 5476 bytes
font_01_sfnt_off00006b12.bin
f424d828c7597ac1c7327a4e7b98b9003b69566c39c729ba040fdf209891e47c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B12 10872 bytes

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