Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66385efc5c3f27e…

MALICIOUS

PDF

34.6 KB Created: 2020-08-17 12:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bd20a4dce2b56fa36277fe9e8480c80 SHA-1: 3b8b3b87c44e0a4bac9ab84fdf539729b5b459a7 SHA-256: a66385efc5c3f27e5b44d37f0af151864df090ff56f8196835ddc54796a0cb69
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector identified by the heuristic. The presence of a large number of external links suggests a link farm or redirection strategy to distribute malicious 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/pify?keyword=balloon+no2+font
    • http://files.gardensofelegance.com/uploads/1/3/1/8/131856877/bogomiwekuzusef-guguganiminazo-ferolekow.pdf
    • http://files.drcarterscourses.org/uploads/1/3/1/3/131384429/1077953.pdf
    • http://files.sunsetairporttransportation.com/uploads/1/3/0/7/130775200/pawomivorakidavumuva.pdf
    • http://files.oshawaprobus.com/uploads/1/3/2/6/132695919/4022979.pdf
    • http://zozimuw.evrimozgen.com/uploads/1/3/1/4/131411688/fojedopilox_gapaniroxe_jamawujuvaposad_tawuworijob.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/1212079396.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/mastering_physics_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/zijejunalorigovaze.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/41334920132.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/61664597678.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/libijip.pdf
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/emotional_quotient_inventory_youth_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/61787879478.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/gerugepuripemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/56878689384.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/6024950969.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_off000047a1.bin
07f90f80ddc044b3919240f2478e7593065700e35c4eb1884daa73bf6baff41f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47A1 4668 bytes
font_01_sfnt_off00005794.bin
d724ab823f3a546cbc7574687126edc78bd74aa210c55cb896626c3a757fbb7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5794 11332 bytes

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