Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7722efddbb4219…

MALICIOUS

PDF

39.9 KB Created: 2020-08-09 06:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f2f5da50500a50a174e0bd8486ca194 SHA-1: a1276c720d90cd964faaf89af6138c19be3f6c11 SHA-256: 1c7722efddbb421995aba603689ddbd9adfd908f5e251622dc89a992b8eff57d
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including a critical link to a known malicious redirector at ttraff.com. The document body text, though heavily obfuscated, contains the phrase 'Medical certificate pdf file download', suggesting a lure to trick users into clicking the malicious link. The presence of numerous Shopify links, while mostly benign, contributes to the link farm heuristic.

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/pify?keyword=medical+certificate+pdf+file+download
    • http://files.iancuttingphotography.co.uk/uploads/1/3/2/6/132682303/kasim.pdf
    • http://xukaj.treshijos.com/uploads/1/3/0/7/130776485/4626712.pdf
    • http://files.microartldn.com/uploads/1/3/0/7/130776619/wupudexivapij-lakaleluve-xudinaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/ganesha_atharvashirsha_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/puveges.pdf
    • https://cdn.shopify.com/s/files/1/0434/0400/1443/files/advanced_calculus_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/10781337151.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/21677454034.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/7784871481.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/7149406898.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4551/files/63406532193.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/42737932503.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/neuralgia_del_trigemino_diagnostico.pdf
    • https://cdn.shopify.com/s/files/1/0437/3364/7525/files/38658904385.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/lukikabisenutaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/45469018847.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/utilitarian_theory_of_law.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_off000060bf.bin
49cea219c588cc0c14def65fac993d1ff14bfdd040c12f60d98e6514d728616b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BF 5068 bytes
font_01_sfnt_off0000722a.bin
b872d5b341628f0865db77993a7c811f79be6eea5e6ec3fd33974bb18fd3ed01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722A 9564 bytes

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