Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53c95701e8b0ffe…

MALICIOUS

PDF

45.7 KB Created: 2020-07-30 13:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0757156454aa7750ddd2c31ccaad8659 SHA-1: b459bbd52914cc4061d1a15e20244ac96c167081 SHA-256: d53c95701e8b0ffe539cd16b2044ed3c246e24a96d18cc85cacbe10a32f5020a
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to domains associated with link farms and redirectors. The primary malicious URL identified is ttraff.com, which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and appears to be largely junk data, suggesting the primary function is to host the malicious links.

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/pify?keyword=anatomy+of+foot+pdf
    • http://files.parisglam.com/uploads/1/3/2/6/132681698/e51268cc986f.pdf
    • http://files.lansdownecommunityleague.com/uploads/1/3/1/6/131606092/rigudotisekiferojofi.pdf
    • http://files.retrovideogamez.com/uploads/1/3/0/7/130739922/2fa2a32f8fee.pdf
    • http://files.paveopenlab.com/uploads/1/3/1/0/131070294/fofonupoxedena-jurebegaluruwud.pdf
    • http://files.lucillekim.com/uploads/1/3/1/3/131380870/5047e97072.pdf
    • https://cdn.shopify.com/s/files/1/0434/3365/6476/files/47701076594.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/ximukisokujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/ladoganari.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/32942897718.pdf
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/mawurutikusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/86658132262.pdf
    • https://cdn.shopify.com/s/files/1/0438/2277/6480/files/74336738123.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6594/files/tixosixar.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/gefadebitira.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/3423929472.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/70443210606.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/70444996432.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/pajusujubovane.pdf
    • https://cdn.shopify.com/s/files/1/0436/3144/4128/files/xogovozazixinefimijipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.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_off00007976.bin
594a1c761b696b60e41ffe3edcd92b4e72857eae1cfa91587e41563ed9b9dc87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7976 4596 bytes
font_01_sfnt_off000088f7.bin
e9f3f06e3ff622f501ab84bb6191a23d7781a95c87d604a4f2657ad6775e9abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88F7 9480 bytes

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