Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57b33dd4b2349d2…

MALICIOUS

PDF

33.1 KB Created: 2020-08-30 12:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af2a9c4ab46c82736a979de6888d4a94 SHA-1: 472baed5deac31827a935bf1637ccade437e9edd SHA-256: d57b33dd4b2349d27ba7497afe7530595bf7cf84e112725dd934e89a960ceb41
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation to increase the visibility of the malicious redirector.

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/wix?keyword=table+tennis+score+sheet+free
    • https://static.usrfiles.com/ugd/12745a_bf5baca391014171923e5c1fb14938dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_854d07ea873f45c381e7c44f16111951.pdf
    • https://static.usrfiles.com/ugd/b8c837_005f54a3d0314c419e472c030b880a2b.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_fb89c5f813dc451da224744c6a30211a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cd2368c0c364fc0b2f561985575212e.pdf
    • https://cdn.shopify.com/s/files/1/0435/6793/9743/files/sufowiresuzegu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/gokibemepuga.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/setting_aside_arbitral_award.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9773/files/55527872106.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/aceite_esencial_de_oregano.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/36227386870.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.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_off000046e9.bin
3f98bd5dc54db4e9aa25bdbed93f7a5b5111a6d06b468679848e1be41adeff62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E9 5060 bytes
font_01_sfnt_off0000580e.bin
d5dc9db44cc82219936871f04020bb7e9c8306dd9fd7c034a2d1699ef5b85c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x580E 9360 bytes

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