Malicious PDF — malware analysis report

Static analysis result for SHA-256 7835d8b709997bf6…

MALICIOUS

PDF

49.8 KB Created: 2020-08-06 09:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd69490bd10134f88f571305648a5de8 SHA-1: ee4bd6bfb33dd354cb0750bb097fd6190346918b SHA-256: 7835d8b709997bf60d1039167bcff9a9fd43557d14a614b5a3ba3dd513e637a7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a specific URL pointing to a known malicious redirector, indicating an attempt to lead users to malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into a financial scam by promising a prize or parcel delivery. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=biology+important+questions+for+class+12+pdf
    • http://files.shopslothlife.com/uploads/1/3/2/6/132680813/zumaz.pdf
    • http://files.hourglassdevizes.co.uk/uploads/1/3/0/7/130740221/kopixokisa-lepupokad-tupisoludub-figolud.pdf
    • http://lalag.azpetscan.com/uploads/1/3/1/4/131409090/bunexopefajixe_pidojemil_subuguzewedamo.pdf
    • http://files.minnesotadivingacademy.com/uploads/1/3/1/3/131383586/9280685.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6487/7475/files/gisibesefitazapositozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/2nd_grade_plural_nouns_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/gudafoxitelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/63091281475.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/63129652459.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/98928135482.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/git_move_commits_to_another_branch.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/66320001978.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9629/files/java_eclipse_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/dell_inspiron_1545_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1879/7724/files/35991094521.pdf
    • https://cdn.shopify.com/s/files/1/0432/3780/2146/files/niwubavimikemavalosiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/varogejisubekaruresum.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/dozebezotobinaxujat.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d6f.bin
73de5e6407540733c315765e80eddeadfe62e7a9adda0fa1f20394ca8d554a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6F 5936 bytes
font_01_sfnt_off00008197.bin
40abc69b9026c2a14a52732eb59f9a4fc692aa487655bfa049dc4ab404f8759e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8197 10244 bytes
font_02_sfnt_off0000a4af.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4AF 16164 bytes

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