Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0447319503c618…

MALICIOUS

PDF

46.8 KB Created: 2020-09-05 05:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 560d105f566673a9a8cfcc82aecf942f SHA-1: 1b9a59ee491ad0c698ec2496ede532731cbc7e00 SHA-256: ad0447319503c6183a2021aff70a02ff053a1e546575242844b71e82276885b3
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a malicious redirector link, pointing to a URL that appears to be a lure for interview questions. This URL is the primary IOC. The document body, though heavily obfuscated, contains the same URL and text, reinforcing the lure. The file also contains a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic.

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.club/wix?keyword=fire+lieutenant+interview+questions+and+answers
    • https://cdn.shopify.com/s/files/1/0455/3962/3077/files/theories_of_bounded_rationality.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/demakulinupafax.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/46029658967.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7818/files/vedemusefalilibuwuj.pdf
    • https://static.usrfiles.com/ugd/bd1c09_39adfeb8e4864ed88bc7b97c95987a69.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_d01bf6f84e5c4919a824fffce34d9148.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_211959a6109a443d96802e170083f6ac.pdf
    • https://static.usrfiles.com/ugd/145364_d2bf00e533f745879e1f79b6f047bd05.pdf
    • https://static.usrfiles.com/ugd/b8c837_108330e012aa4023a29d35106c08d965.pdf
    • https://static.usrfiles.com/ugd/bbd3cf_4994a3b218f543b0bf8e465838af907c.pdf
    • https://static.usrfiles.com/ugd/d017d5_0bad263e833e4a999ca4f833f3500217.pdf
    • https://cdn.shopify.com/s/files/1/0445/6510/2751/files/ariel_atom_3rs_performance.pdf
    • https://cdn.shopify.com/s/files/1/0435/8291/4723/files/asepsie_antisepsie.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/gevukopekoniramelinoxipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/dosobevofowotixumune.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_off000079e1.bin
8a9df1b34ced21900e48b7ff1723dc74a2a661f98dcdf4ab8bd19bd42846cd75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E1 5052 bytes
font_01_sfnt_off00008b30.bin
eb64402db2c1dcd695df34961f6cbdfa4ba271ddb01cfb5a64da1775b98b727c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B30 10120 bytes

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