Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f744f9b87b1563…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 16:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b352033f4f4fd71c28ce040bf82ca21d SHA-1: fe152dbc05c2a6704fa10237122dd60173e4fac4 SHA-256: 28f744f9b87b1563afdc4debb9e09d22582e5162fe46c9b6608fc85a3e815635
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are to Shopify-hosted PDFs. The document body, though heavily corrupted, contains the malicious URL, suggesting an attempt to disguise malicious activity within seemingly legitimate content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=no+man%2527s+sky+teleport+network+offline
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/crooked_kingdom_read_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/6197604133.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/kedepasetupuz.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c1c454d54db450cae5065e5c133188e.pdf
    • https://static.usrfiles.com/ugd/b8c837_de519511f77a4c08a3ccf7fc9737d993.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b0dac275a19442d8585557a980fbff0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e78df294ef654ab2b940ce7421fba450.pdf
    • https://static.usrfiles.com/ugd/b8c837_12989437c7b045778bc8d97e3161f556.pdf
    • https://static.usrfiles.com/ugd/b8c837_33284a30091f4077a062a2edbcfe5c9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e78e36a1c22747dcb339d72b2da3f9c5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/divefixine.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1023/files/merixikosovowif.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/22522442761.pdf
    • https://cdn.shopify.com/s/files/1/0435/2209/7304/files/693316129.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000647e.bin
b7b5f11e81355fcce6e6be7e395ac3fb4e1bcb61bfa18e56333d8b082f080c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647E 5096 bytes
font_01_sfnt_off000075d0.bin
76f8b1e5b22c275b802f9a9f00eb4773bbd4eca64a4500b0578da368b3df16d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D0 9824 bytes
font_02_sfnt_off0000977f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977F 4324 bytes

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