Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32c7ca809280c81…

MALICIOUS

PDF

37.5 KB Created: 2020-08-22 15:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ba4c8223b1faad328382806b349f561 SHA-1: 6a15bbc177849d94e72e7475673175106a027a40 SHA-256: d32c7ca809280c8114a23e856a46098ae0be654e156543cd773f58534f5728f3
120 Risk Score

Malware Insights

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

The PDF contains a link farm of numerous PDF files hosted on Shopify, likely for SEO poisoning or to distribute malware. One of the primary links directs to a known malicious redirector, ttraff.com, which is configured with a keyword related to downloading an Android application. This suggests the document is a lure to drive traffic to malicious infrastructure.

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=stremio+apk+android+4.+4
    • http://dogiga.flexitunnel.co.nz/uploads/1/3/0/7/130776255/2304005.pdf
    • http://files.royartist.com/uploads/1/3/2/8/132815015/wimumeza.pdf
    • https://cdn.shopify.com/s/files/1/0437/7965/3789/files/4384453826.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/muwelivivululovekovane.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/gowexonadipinivuzamizoki.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2177/files/arrival_of_the_birds_spartito_piano.pdf
    • https://cdn.shopify.com/s/files/1/0452/9088/1185/files/19770475704.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/pokemon_go_curveball_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/6644/8277/files/least_squares_fit_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0432/9766/9278/files/genetic_engineering_process.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_off0000552b.bin
4ec406117b403ef9a40ef91711eefeb77748194102c9f37c8445b5eb31687856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552B 5184 bytes
font_01_sfnt_off000066b5.bin
cdc53cfffd6f61b3f7f7931de46ea0f20bef75a4737a8b0fd5040e2fb79b142e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B5 10204 bytes

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