Malicious PDF — malware analysis report

Static analysis result for SHA-256 171a6fde7512e5f2…

MALICIOUS

PDF

57.5 KB Created: 2020-08-06 12:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85a91f51d70f3fc489858f491da291a8 SHA-1: 24abc5af99841daa1f1f3d7eeea5fab70fe3d5e7 SHA-256: 171a6fde7512e5f29ff4448e8c60639ccbc704dae005e6290f4da9a7964b2092
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious content. The primary malicious redirector identified is https://ttraff.ru/pify. This indicates a phishing or scam attempt to drive traffic to potentially harmful websites.

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.ru/pify?keyword=tratado+de+bucareli+resumen+pdf
    • http://files.juliehortonphoto.com/uploads/1/3/1/3/131382470/noliwijadoxa-lotutidanuwumu.pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • http://files.alphachichico.org/uploads/1/3/2/7/132740234/2485425.pdf
    • http://files.katelyndiane.com/uploads/1/3/1/3/131384635/bumanowor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1513/3605/files/xesipodejavusuxoditigojo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/3_golden_rules_of_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2394/files/mojesedikikuboxubovukuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19490865332.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/45427726467.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/18695412901.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/71892139977.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/17235245644.pdf
    • https://cdn.shopify.com/s/files/1/0432/9970/0889/files/pamokixik.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/fobipebigixupopelidebenos.pdf
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/pivafinaxenegikuxeviwim.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_off00008b91.bin
ca0c4af25ce63fcc7e86a5c7fc0f89c44dbc57efdb36a63a29359360f3c58ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B91 5392 bytes
font_01_sfnt_off00009dc6.bin
806642f223afd6114e7c8240cad7125bdd447ea7937abd9ba04c38cbf87c75f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC6 11004 bytes
font_02_sfnt_off0000c1d1.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D1 16204 bytes

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