Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ba0ab821029198…

MALICIOUS

PDF

46.8 KB Created: 2020-08-09 06:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2517c0f7f34ef7dab38be6431e05063e SHA-1: 0953917c7a94774619f97f4509d77d79ed345146 SHA-256: b7ba0ab821029198049648316f52b06b8f2bce4c825468a3a884856e68563bcb
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes the URL https://ttraff.ru/pify?keyword=adverse+selection+and+moral+hazard+in+financial+markets+pdf, indicating a lure to a malicious site. The presence of many PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links within the 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.ru/pify?keyword=adverse+selection+and+moral+hazard+in+financial+markets+pdf
    • http://ranuwuni.hugotonassembly.com/uploads/1/3/2/8/132816066/f496ad01782b3.pdf
    • http://files.obpassociation.com/uploads/1/3/1/4/131414134/9215297.pdf
    • http://files.barbaramwebb.com/uploads/1/3/1/3/131381679/4282266.pdf
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdf
    • http://files.cardiac-imaging.org/uploads/1/3/1/4/131437657/f150f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/effects_of_acid_rain_on_the_environment.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/kazigijijalatuwapolazuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/63142299427.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4277/files/pdf_to_word_converter_offline_free_download_for_windows_8.pdf
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/36383895468.pdf
    • https://cdn.shopify.com/s/files/1/0429/0274/9347/files/bahasa_arab_anggota_tubuh.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/gemeliworawelizub.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7599/files/gowajukedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/xarefefabigipuxedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/28620996031.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_off000077d8.bin
83b9b8486e5826f90b580a414901194297a422a53312aab80e86fe327021ab62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D8 5556 bytes
font_01_sfnt_off00008aa8.bin
3c8191360a64befd0b5c42779c6062fa265ef4db80e32326b584c7565c176924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA8 10404 bytes

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