Malicious PDF — malware analysis report

Static analysis result for SHA-256 476d269dc5670aaf…

MALICIOUS

PDF

55.0 KB Created: 2020-08-30 00:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af06c8eaba79588e71ab798454646fdb SHA-1: ff7b2919a825885ea5657c291f3d15c272d9c327 SHA-256: 476d269dc5670aaf464068427716135443c72740062dadc3fb624efbd9ba84c8
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is ttraff.com, which is known to host redirectors. While the document body contains garbled text, the presence of embedded URLs and the heuristic firings strongly indicate a malicious intent to redirect users to harmful content.

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=tripitaka+online+english
    • https://cdn.shopify.com/s/files/1/0463/3313/2955/files/irregular_verbs_worksheet_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/1527946838.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/willingness_to_pay_for_health_insurance.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/39299337975.pdf
    • https://cdn.shopify.com/s/files/1/0437/3174/6967/files/75115051717.pdf
    • https://static.usrfiles.com/ugd/f4de5e_0cd28feb850c4639abbfa067f37351fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e97ca742095433ca6b4e60f8d16cf3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a43bf9a8aae42f4a207955909f500d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7ceaabc4d1945d08c2a6225905d296a.pdf
    • https://static.usrfiles.com/ugd/7e6083_55227ccf001c4d89b46b95436a7dfa5c.pdf
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/baby_rhymes_video_free_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0436/4615/6960/files/bejomonobopemavuromogaxem.pdf
    • https://cdn.shopify.com/s/files/1/0446/1376/3235/files/mobile_ad_hoc_network_notes.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/60185120491.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_a2250632fc214a338b3a8de3b514e7ac.pdf
    • https://static.usrfiles.com/ugd/0a052f_8a915b02656449008f6dd6b075a0769e.pdf
    • https://static.usrfiles.com/ugd/ce14f3_a7d67340e45848448b973db4dea5e09b.pdf
    • https://static.usrfiles.com/ugd/b8c837_114e5d7d0dcc4541a4bc9ba8b55104f5.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_off00009b64.bin
222bfcf52cbc49997d66895f197cee899e9bbb80d0500d1507dc84bac3da6563
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B64 5096 bytes
font_01_sfnt_off0000acac.bin
f95c6a5607eb511dc871551d8e7b681df06874ec278db50210dbabd6e6e3e8ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xACAC 10696 bytes