Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc47e6b49e6d0912…

MALICIOUS

PDF

34.0 KB Created: 2020-08-03 01:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f38b6934ddb030d77bb2fba459c65f4 SHA-1: 205c69deffef69d1ae9f87460d16409de96548f1 SHA-256: dc47e6b49e6d0912af56f6afe9f0acd577df6faa6f9fe2888c31365de6937807
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a malicious redirector. The document body, though corrupted, contains text suggesting it is a lure for a calculus textbook PDF. The primary malicious URL is https://ttraff.ru/pify?keyword=james+stewart+multivariable+calculus+7th+edition+pdf, which is likely used to redirect the user to further malicious content. No scripts were extracted, but the PDF structure itself is used for the malicious redirection.

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.ru/pify?keyword=james+stewart+multivariable+calculus+7th+edition+pdf
    • http://files.technologysales.net/uploads/1/3/2/7/132741110/bagutidopenaz.pdf
    • http://files.suefortgensartandprints.com/uploads/1/3/0/8/130874042/76bfcb.pdf
    • http://files.nfp-excellence.org/uploads/1/3/1/4/131436980/vaselevozonij.pdf
    • http://files.emmanuelgreenwood.com/uploads/1/3/1/3/131398188/mubivurorejefisipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/tiwagajubuzes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/jonisixelusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5149/files/43815702176.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/13511533550.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/vemokaxunogoxorowo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1163/files/gemapidilebulotonoduros.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/lororiwifat.pdf
    • https://cdn.shopify.com/s/files/1/0431/9635/0624/files/pumurute.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/xinuluxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/58448011495.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/97267653587.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/murugalof.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_off0000454e.bin
475ac2bc2e6b2668b2a7892bd170f5942f20f91bcb39267a5029602f52c6d55b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x454E 5756 bytes
font_01_sfnt_off000058d9.bin
36d92bcc14ee36da0c03641b3ac4c0d58dda2642def59d79330f4c7802423d7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D9 9984 bytes

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