Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5c7ea435272aea…

MALICIOUS

PDF

44.2 KB Created: 2020-07-27 01:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2dfd19bd525c7204ee30b205daa5fe9 SHA-1: 8146590297a86eb03ee0f57562cc2f39d94cf3f0 SHA-256: cf5c7ea435272aea0cddce7dbb7dd68c1e2702dc7f7435ca3e1f49e9a697491b
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on 'cdn.shopify.com'. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to trick users into clicking the malicious link, likely for a phishing or malware distribution campaign.

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=bookworm+adventures+1+free++full+version
    • http://files.mainternational.net/uploads/1/3/1/3/131398350/kebujipasotatopow.pdf
    • http://files.cinnamonpackets.com/uploads/1/3/0/8/130814680/9382943.pdf
    • http://files.aeriali.net/uploads/1/3/2/6/132695194/5503339.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/dafidi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/19825414092.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/26480409381.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/wilaxomonenidezumugijug.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/97318049910.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/35158345435.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/tutinesogomonobejodano.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/finepimipovijel.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/meguwopesozixezam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9232/9119/files/ribuva.pdf
    • https://cdn.shopify.com/s/files/1/0437/9620/1629/files/93221983781.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/24972796391.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_off00006ec8.bin
a42f7781ffb9a8f51c48ffe1f2a275afa1c5843c8f49084423e9bc4fb36b8cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC8 5252 bytes
font_01_sfnt_off000080a8.bin
aba89bdab13e8fbfaed5f087257a338be5f1dfc86975dfacfac4057288d5206c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A8 10276 bytes

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