Malicious PDF — malware analysis report

Static analysis result for SHA-256 7470ecd273480c5f…

MALICIOUS

PDF

45.0 KB Created: 2020-08-02 19:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a5f3a626e90d1dac036012dc003ddde SHA-1: b890e6fc7dffc2a9959e9373ac2bec9d1b4473b2 SHA-256: 7470ecd273480c5f2c0d3c80bf29c65ee28c077872fae8ed1e691d423f736c89
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a software download, which redirects to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger link farm, likely for SEO manipulation or distributing malware. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=hunger+games+mod+1.+7.+10
    • http://files.wonderpupspetcare.com/uploads/1/3/1/4/131483361/sigaxit_wonolirofaj_tunaxisobiva.pdf
    • http://files.grantjacobyanddancers.com/uploads/1/3/1/4/131437702/wuroripasod.pdf
    • http://files.iancarlsen.com/uploads/1/3/2/8/132815359/1607680.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1627/2547/files/88233925294.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/concrete_structure_properties_and_materials_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/44625723692.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/84787184770.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/wibepuzopasuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/polonafebomi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/56717512157.pdf
    • https://cdn.shopify.com/s/files/1/0432/1060/4705/files/kelasalenot.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/17638881677.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/3937708209.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/zanefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/zivovakubugenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/8637185156.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_off000059f3.bin
4fb2205de27764efcf216e5851b57c4e92e1677905d58ef24f913f54857c1346		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F3 5380 bytes
font_01_sfnt_off00006c39.bin
c8a861f8f57325307622381e165f8eeebc3c60fd5165a9e0cd2567ffeb23bc0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C39 10620 bytes
font_02_sfnt_off000090ae.bin
8ce0575abc6f686af3c1393089841c21814f5c4838d5adbe0d649219e58da802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AE 16064 bytes

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