Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cda047e51a534b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-23 00:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77be38ecaaf0a56c6399732e16b2838b SHA-1: 16b0bd14f6137bab13b59f68913d5572083ac5dc SHA-256: d0cda047e51a534b96ca0ab797c8e37b69c4f76573e0bb55db19e0ce5095c418
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented to the user as a factoring worksheet. This suggests the document is designed to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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.cc/pify?keyword=factoring+word+problems+worksheet+doc
    • http://zodan.khoueiryrealestate.com/uploads/1/3/1/0/131070420/xunesawe.pdf
    • http://files.evolvecounselingoflansing.com/uploads/1/3/1/3/131383247/cca1c.pdf
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/8508737254.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/vtech_phone_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/nufukejume.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/valuzune.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/audit_report_format_fy_17-_18.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/mapadu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/xixarejufidumig.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/32972559485.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/dopofaxuwetevenigudizale.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/54346307279.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/nosafirusajej.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/rizisewirakixasovuwukeson.pdf
    • https://cdn.shopify.com/s/files/1/0437/4442/8181/files/kovotegibilipixuwogixivem.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_off00005f2f.bin
f676ba4edfb4061d5647e08e8e71e6e78087f40058e185513d0898e103bd2989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 5736 bytes
font_01_sfnt_off0000728f.bin
9e0e188bcd501e3adcbf7eeca54d77452a8ab0d5eac9f35f586c5c4ffac823cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728F 12616 bytes

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