Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb8e9cc2c068515…

MALICIOUS

PDF

40.0 KB Created: 2020-08-18 17:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5429b3d8a263419c4c0a3463fab5533d SHA-1: feceaed395668e6fc4a583b97dc8107eba280290 SHA-256: ceb8e9cc2c068515b4a2de463e0f55448c97c5400f5cd01365bc1c19cbd8bedf
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body itself is heavily obfuscated but contains the same malicious URL.

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=feeble+crossword+puzzle+answer
    • http://joxega.marinovdance.com/uploads/1/3/0/7/130739290/5b095.pdf
    • http://files.lovetywyn.com/uploads/1/3/1/8/131871614/dazifo_tiruzodofupulu_xomerarewus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/vepakalagivebobugabowon.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/oak_sapling_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/2449/0397/files/10282338143.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/criminal_law_reviewer_san_beda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/dimibetufukulinavin.pdf
    • https://cdn.shopify.com/s/files/1/0437/5946/8701/files/158960602.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/angiofibroma_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7943/files/42134117041.pdf
    • https://cdn.shopify.com/s/files/1/0430/4276/7001/files/41287229386.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/22339928424.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_off00005dc6.bin
88452bee4cb3f8f38934b5fbd6785bf19fbae9cf8ef52cd753bd264452f51bbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC6 5304 bytes
font_01_sfnt_off00006ff2.bin
2ab67a09f1b4f85f254cf2500a30900f393f7e123a1710df8c3ad00e5df80948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF2 10356 bytes

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