Malicious PDF — malware analysis report

Static analysis result for SHA-256 55619dcd75b4aae3…

MALICIOUS

PDF

145.1 KB Created: 2020-08-19 18:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8bffa2095ec53b01be103c538659873 SHA-1: 10502f3f3fa0a2344be59a855515ef601886efd2 SHA-256: 55619dcd75b4aae30a91281c9ed67519e653f0ffde03cad7b42e9b85f8a78fd8
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains heuristics indicating it is a malicious redirector and part of an advance-fee scam, using language related to invoices and parcel delivery. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the PDF is designed to trick users into visiting malicious sites, likely for financial gain.

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=istanbul+travel+guide+wikitravel
    • http://files.thebathhouseco.com/uploads/1/3/2/7/132740598/gurogow.pdf
    • http://files.adamwilliamchalmers.com/uploads/1/3/1/0/131069763/302529.pdf
    • https://cdn.shopify.com/s/files/1/0432/6329/5654/files/two_dimensional_array_example_program_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/noise_risk_assessment_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/16498938099.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1539/files/video_editor_free_add_music.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/wamed.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/xolesemitomivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8290/files/jekikelasarogipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0619/files/fusivoxajoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9836/5340/files/luggage_security_system_mini_project.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/wisofeva.pdf
    • https://cdn.shopify.com/s/files/1/0434/6819/3952/files/bisaya_to_tagalog_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/maxavisaluwodufejun.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d9fa.bin
917990c74c7ebac8a7e14284855413705cac75a189c6f342d3d54530b0c63bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9FA 5288 bytes
font_01_sfnt_off0001ec0b.bin
31697adddb6917ee01072dd4acae97e3d4c53f0220f64af323d59f9791d9f486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC0B 11544 bytes
font_02_sfnt_off000212ea.bin
b29db41b9abf1283e5917ed084e385b1300f15a5043abbe2a8d05d7550163896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x212EA 17184 bytes
font_03_sfnt_off00022b67.bin
c2801e3c7c948aab6fcba4baf995138318bd33128f9bf655d7c50697380e974a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22B67 2616 bytes

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