Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51e507a976e4949…

MALICIOUS

PDF

44.5 KB Created: 2020-08-11 05:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e2b47448ce7cafecdf185557ce65e9a SHA-1: 01556d2f9a974471e3bf0e1433124ce10b49ea00 SHA-256: e51e507a976e4949fc84ce09e09be1f8ac281c3611c843795ec6c805dcf7ba42
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, suggesting a lure to download further content. The ML 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.com/pify?keyword=adultery+book+pdf
    • http://wezid.colleencomerford.com/uploads/1/3/0/7/130776445/61504cba550561.pdf
    • http://sezawe.vvsahs.org/uploads/1/3/1/4/131482975/xabadatu_rivad.pdf
    • http://files.stcm.org.uk/uploads/1/3/0/8/130814397/6612e4.pdf
    • http://files.drjasonwilliams.com/uploads/1/3/1/4/131437491/bozoduxaja-sodakigoxik.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/62785084303.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/radicales_libres_quimica.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/oklahoma_accident_reports_online.pdf
    • https://cdn.shopify.com/s/files/1/0439/7950/5822/files/anomalies_du_liquide_amniotique.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/26464311639.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/xenazukalusosegusikajo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2252/4326/files/53535945343.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8097/files/zepepuwalujit.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/36897094600.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/kozelesukoxajoviwudux.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/dubelotupovifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/zijolibudakikoverazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/7334689111.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064b8.bin
60025fdd18bcc70fcd93493a78fc2ef18121f24c6762f7defdec4930284538eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B8 4668 bytes
font_01_sfnt_off000074af.bin
bca2448cf7769f36938837b5dbd7b1ba4c4beb3320205fbe57a39d91b7d417a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AF 10108 bytes
font_02_sfnt_off0000973f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973F 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.