Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f274253abfa37b…

MALICIOUS

PDF

48.5 KB Created: 2020-08-11 07:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59a0bc2ae956771863275d46a6893972 SHA-1: 3b0ffdc8e02005711efd965a7721cad6a4ef5df8 SHA-256: c5f274253abfa37bca46959c362b5d653bfad06860b1e796a277a9fa92ccd224
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded external links, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.cc/pify?keyword=adeste+fideles+pdf+choir', is flagged as a malicious redirector. The document body contains garbled text but also includes the same malicious redirector URL, suggesting the primary purpose is to lure users to malicious sites.

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=adeste+fideles+pdf+choir
    • http://wuxisutut.performance-icehockey-english.com/uploads/1/3/1/4/131453540/temulewewo.pdf
    • http://files.spartanleadershipgroup.com/uploads/1/3/1/8/131856232/nifaniro.pdf
    • http://files.whidbeyworkingartists.com/uploads/1/3/1/3/131380773/b3e4ed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/61617743706.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/kokuvawalikubo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/bijafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/joxupowogemodelibobetexek.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/xabaputujonasor.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/bupiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/8027/7406/files/zajebelomuxobabunokun.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/54219806077.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/48130911685.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/77622204031.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/kupusab.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4615/files/suwixinetamepav.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_off00007039.bin
624d23c452b28be26b4fdae34c7778e0c70654a22f548b926f40c89f8e38986f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 4704 bytes
font_01_sfnt_off00008043.bin
275bf6fe8d31de45f08c39d98290b29118f52c2f59df7c16bc82a11c83e939cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8043 12088 bytes
font_02_sfnt_off0000a6d1.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D1 4324 bytes

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