Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97cf1362a731c75…

MALICIOUS

PDF

37.1 KB Created: 2020-09-20 07:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02107ae1798d24bf9260e2a32928ec6f SHA-1: 619603a392431e03daf9fd785eb6ca00bd4d6096 SHA-256: d97cf1362a731c75ed0fec485f22509a7430bc3878f6fc0c014026ca17004959
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 indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, including a primary malicious redirector and many links to external PDF files, suggesting a phishing or malware distribution attempt. No scripts were extracted from this sample.

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.me/wix?keyword=cuento+no+david+no+pdf
    • http://rusul.tedhayward.com/uploads/1/3/1/3/131379699/3890199.pdf
    • http://jokopo.mothersylvia.com/uploads/1/3/0/7/130738824/sakusakelak.pdf
    • http://files.hillfarmhistoricalsociety.com/uploads/1/3/0/7/130776680/4131100.pdf
    • http://siven.dontworryaboutme.com/uploads/1/3/1/3/131378950/magusesewemido-gaxisuravewur-mukonurar-zoxolikuweriwa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/woxevekototaporilube.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/fable_treasure_clues.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/whirlpool_duet_washer_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/68920443416.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6622/files/ielts_academic_speaking_part_2_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/xoduwazuxirepoxereri.pdf
    • https://d049ef2d-106e-4dc2-82cf-c91d3874b60e.filesusr.com/ugd/debbe1_e2ceca523534431f94d061dfcf6bf3a8.pdf?index=true
    • https://15d58ce7-da52-4ceb-9305-41a860fc0774.filesusr.com/ugd/e80f4c_2178a56db9504ed8b0983396bf889e92.pdf?index=true
    • 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_off00005543.bin
5197abb310172496fc3f633398ad50e9a8469bd341191def6c4fb3dd2b996822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5543 4696 bytes
font_01_sfnt_off0000655b.bin
b3417372058b4532118ab314126925e1ff4f05d7248f58dcf44737f8069cb6b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655B 10212 bytes

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