Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78c0c360bca863e…

MALICIOUS

PDF

49.6 KB Created: 2020-08-07 18:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ba70e0d48d859247aedfb0eda5ea628 SHA-1: 4f2abc204f025886b95f4fdd1f9869bf8e4b9ea1 SHA-256: a78c0c360bca863e59cd573379100f9368774c50a7ae37790c176576856cd89f
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lure the user into downloading further malware. The document body also contains a call-to-action phrase, reinforcing the social engineering aspect of the attack. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=developing+the+public+relations+campaign+pdf
    • http://files.stlouiscancercare.com/uploads/1/3/1/3/131383661/faliwaxewafavas.pdf
    • http://files.embroideryequipment.com.au/uploads/1/3/1/3/131379085/xovema.pdf
    • http://files.popiconsblog.com/uploads/1/3/1/3/131398059/sazuneve.pdf
    • http://files.southwestiowadentalassociates.com/uploads/1/3/2/7/132740285/bd0ba.pdf
    • http://files.communiteabooks.com/uploads/1/3/1/1/131164446/7550941.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1959/files/wiganifobadeda.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/futisupefelifenowid.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/vegexerebupuvasitolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/introduction_to_biophysics.pdf
    • https://cdn.shopify.com/s/files/1/0433/3037/1739/files/61238818728.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/porikesusopugatorajulore.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/2417805709.pdf
    • https://cdn.shopify.com/s/files/1/0428/8787/2671/files/don_juan_lord_byron.pdf
    • https://cdn.shopify.com/s/files/1/0428/6965/3663/files/lazijet.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_off0000834d.bin
1c6e2bc5da2ad0911943057a3d813b57beb2a6e51a685e478795353682adb0b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834D 5768 bytes
font_01_sfnt_off000096cf.bin
4febbe63647b99545ebeb53fe25d76c0bbd308f6586bb9619f932d02acf5e8b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96CF 10240 bytes

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