Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08144e4a098a629…

MALICIOUS

PDF

43.8 KB Created: 2020-08-11 16:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1270061ad18c807b29a34b20420f180c SHA-1: 1a9debc529e750a4b03026a82b040b9a9acc94ab SHA-256: b08144e4a098a629612734510c51ca6befd8e66fcc4025316bf0fa5ac016d75f
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to potentially malicious redirectors. The heuristic PDF_SEO_LINK_FARM indicates a link farm, and PDF_MALICIOUS_REDIRECTOR_LINK specifically calls out a known malicious redirector. The document body contains garbled text but also includes the URL https://ttraff.com/pify?keyword=evangelismo+explosivo+james+kennedy+pdf, which is identified as a malicious redirector.

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=evangelismo+explosivo+james+kennedy+pdf
    • http://gifot.northernsmokers.com/uploads/1/3/1/4/131437462/5149d.pdf
    • http://files.sarexplorer.com/uploads/1/3/1/3/131398085/bipoxaremir.pdf
    • http://files.marykmurphyart.com/uploads/1/3/1/0/131071056/bakoxadiduw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/97491075454.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/97874952.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/95817126010.pdf
    • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/how_to_print_address_labels_from_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/tudisujalabemaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/xadabegufas.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/sivalolobaveti.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5554/files/numerical_analysis_of_partial_differential_equations.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/jenugobumipafapev.pdf
    • https://cdn.shopify.com/s/files/1/0440/3517/8661/files/sawuwasomakovasijenene.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/alter_ego_a1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/pocket_sand_gif.pdf
    • https://cdn.shopify.com/s/files/1/0429/1782/2620/files/vexarixetegaligum.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_off00006aa7.bin
41638f88083cd2c9f4d2dd4c7c9a0a18aa02ecb0ed87f9a647895ff06e01233e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA7 5592 bytes
font_01_sfnt_off00007db8.bin
a1169b7f54e3fe34e608a35da86f14469a75b3a3bd3e23d97fadaf8116f93ee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB8 10784 bytes

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