Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ed0e06d8238cd0…

MALICIOUS

PDF

46.7 KB Created: 2020-07-31 18:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 736d331e5e21832fe0e9d0d50a53cf4c SHA-1: 9f5813f1496ee10c9713c0f6f60b8bc5d0f672a0 SHA-256: 83ed0e06d8238cd0bc64e313e0cb08b0361fc5ad2b2750e55ceba3b73190c9e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=chrome+for+ubuntu+14.+04'. Additionally, a high-severity heuristic indicates the document instructs the user to copy and paste content into a command-line interface, a common lure for executing malicious commands. The presence of numerous embedded links, including one to a Shopify domain, suggests a link farm or redirection strategy to obscure the ultimate malicious destination. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links.

Heuristics 4

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=chrome+for+ubuntu+14.+04
    • http://files.patryanglass.com/uploads/1/3/0/8/130874370/gugosijuxufalase.pdf
    • http://files.muthacluckaz.com/uploads/1/3/0/9/130969002/nojonobi_lefafagev_kugibusavif_sevafoxedatewe.pdf
    • http://files.solomonbamidele.com/uploads/1/3/0/9/130969712/sanarofekolan.pdf
    • http://files.oxfordstation.pl/uploads/1/3/1/8/131856333/nawidesozugojozasod.pdf
    • http://files.washingtonpikeumc.org/uploads/1/3/1/4/131406749/ruxujejeribakozav.pdf
    • https://cdn.shopify.com/s/files/1/0436/7722/1017/files/roxifutomujobebota.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1024/files/zetotugik.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/dufux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/wexirukexebomitusogugafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/41159057152.pdf
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/gifavevuwatobotun.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/kewazetujofovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/tulej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/balatubawagonabigirerig.pdf
    • https://cdn.shopify.com/s/files/1/0430/5145/0519/files/limajeweximo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/58580537769.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/37398823445.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/surubisezivumumukuripad.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6086/files/kanar.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_off000078f1.bin
a22ef544911fe5ea6ebc21a657c3c3081914b8a24f1113a347fdd0950721bfc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F1 4948 bytes
font_01_sfnt_off000089aa.bin
cf19b2620d8844012fd37bb0f07185c642df85f6ceb65e28b9925e44b0d73b97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89AA 10628 bytes

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