Malicious PDF — malware analysis report

Static analysis result for SHA-256 177f2918bd069370…

MALICIOUS

PDF

52.9 KB Created: 2020-08-12 03:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1aa8a495dd704a911c27034c74b2f1 SHA-1: ed2e33ae08b5449478dbf15811d4d1758659b836 SHA-256: 177f2918bd0693707d36d50c4bf85fa2fbf9808e307aac1fcf2de98f5637287c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to 'gospel songs chords pdf' and a URL that mirrors this search query, indicating a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wb?keyword=gospel%20songs%20chords%20pdf
    • http://files.nwflyboys.com/uploads/1/3/1/4/131483254/xuvage_rovuvuvofunog_xowuzoroweruvi.pdf
    • http://files.professionalcapitalpartners.com/uploads/1/3/1/4/131438766/4121815.pdf
    • http://files.sdreece.com/uploads/1/3/0/7/130775411/22db6f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/gitogovadib.pdf
    • https://cdn.shopify.com/s/files/1/0435/0479/5800/files/sokuzedorofodinugusobu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/xopipemumivoganukolojuti.pdf
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/43735509458.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/44198203821.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2102/files/palakubadaji.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/fikikubanukikabinawetu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8436/3416/files/funitofirovolone.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/microsoft_print_to_paper_size.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/86474856983.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20659662050.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5031/files/koselemuzezogigijob.pdf
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/61049726564.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9351/files/tedilivawerusifetudepin.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091e7.bin
4189b071dde3e8d1f0ec5562fd8f0704311902b85ff92f844a80e0eb4108469b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E7 5236 bytes
font_01_sfnt_off0000a3b3.bin
fdfa2d83233b2a7cc9e7ce4459812f6bba84696c4f814ea58ded9f182e6a2f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B3 10284 bytes

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