Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4971f532bd307bd…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 06:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b8ffcfce0a84bd652408bf3c57b7e2a SHA-1: 328050b740cc8d0b023af758ccb59cf5d7494f99 SHA-256: f4971f532bd307bd8eb673b665af2c8cc256ee9fd3c45a314f77de7578bf5e36
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=bucchero+pottery+from+southern+etruria+pdf. This suggests the document's purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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=bucchero+pottery+from+southern+etruria+pdf
    • http://files.bioremediationaquaculture.com/uploads/1/3/2/6/132681556/6800560.pdf
    • http://files.devingraysoncentral.com/uploads/1/3/0/8/130814133/ce61e2ed1.pdf
    • http://files.hillcrestwalker.com/uploads/1/3/1/0/131070394/labivapedowibuwadat.pdf
    • https://cdn.shopify.com/s/files/1/0433/6995/5486/files/3280134924.pdf
    • https://cdn.shopify.com/s/files/1/0431/0450/1922/files/business_statistics_groebner_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/jumebu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/popaxizofarotinutinujizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vunususojorimit.pdf
    • https://cdn.shopify.com/s/files/1/0438/7497/5912/files/davesurerexifasofev.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7345/files/lucerne_switzerland_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/www._einthusan._com_tamil_movies.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/36079024203.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0813/files/environmental_impact_assessment_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/62527242282.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/48905163044.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/pdf_international_auditing_standards.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/rizikizolobizotu.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_off00006306.bin
6892c5e256b36b5cfacce7d407ad8be15ab1b2bfb58f79ed8e758e624b68a8aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 5516 bytes
font_01_sfnt_off000075a8.bin
57c095abed0dde7447206d372974a4af8b54c8bdcc1798f5cbcee54de1dfc8af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A8 9716 bytes

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