Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c658b4f0b4bd7f…

MALICIOUS

PDF

39.6 KB Created: 2020-08-26 23:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b2181e5871616d80a95c720c90ea18 SHA-1: d0d5badca82b94d1be3097e593ba0aea6c937199 SHA-256: e0c658b4f0b4bd7fbbf454fcbe9c1b6e8d7110c6c00cc02ff255ee5e353da71b
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lure users to malicious sites. The primary malicious link is 'https://ttraff.cc/pify?keyword=physical+biology+of+the+cell+2nd+edition', which is designed to appear as a book title but redirects to further malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=physical+biology+of+the+cell+2nd+edition
    • http://rewavupu.scenicchurch.com/uploads/1/3/1/4/131407424/ee5087.pdf
    • http://kobog.the-crafty-sagittarius.com/uploads/1/3/0/7/130738615/3646380.pdf
    • http://files.andyhargreaves.com/uploads/1/3/2/7/132740281/wonobupezelixozafu.pdf
    • http://nakavo.vallenduuk.pl/uploads/1/3/1/0/131070382/labolilasuk.pdf
    • http://jupuj.stjohnsgladwin.org/uploads/1/3/0/7/130775478/juzonaxonoxa_fekipokap_bovugavejajogub.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/45231073252.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/56360470907.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/invitation_templates_for_naming_ceremony.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/bevipolabul.pdf
    • https://cdn.shopify.com/s/files/1/0434/7461/6472/files/all_about_me_newspaper_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0436/0005/2387/files/warhammer_total_war_bretonnia_army_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/72327922764.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/hindu_calendar_september_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/manufacturer_representative_agreement_template.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_off00005ba3.bin
072e3ce21dd5c9f98cae220cfce61e3073d66652f5841643954fc3826071ffcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA3 5560 bytes
font_01_sfnt_off00006e7f.bin
4b6a2b7323f9ff953c14e286309d705003da645f60097c43818cef5800970f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7F 10188 bytes

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