Malicious PDF — malware analysis report

Static analysis result for SHA-256 802249bb9fa4c24a…

MALICIOUS

PDF

195.7 KB Created: 2020-08-12 20:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c5527a9338c03146b14182d5032e516 SHA-1: cf76c77ad83b48610d5da9f6ce23d66ae1dcbd7d SHA-256: 802249bb9fa4c24a38dffe5e3a3288d58f98118b3131b2cf15995f963fefc6a0
92 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to trick the user into visiting this malicious link, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=public+speaking+topics+pdf
    • http://files.elephantade.org/uploads/1/3/0/7/130738620/xowoxijajapaxe_tumujezujebopil_wodufeduk_dabagunokuj.pdf
    • http://files.igrivera.com/uploads/1/3/1/4/131452903/5da1f972cd.pdf
    • http://files.playfulwonders.com/uploads/1/3/1/1/131164355/2375453.pdf
    • http://files.michaelaarodriguez.com/uploads/1/3/0/7/130775557/wiwum-tuguninesupagom.pdf
    • http://napif.cometboosterclub.com/uploads/1/3/0/8/130874359/guruwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/36221727694.pdf
    • https://cdn.shopify.com/s/files/1/0441/1329/7560/files/884537074.pdf
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/92343391463.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/calais_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/7807/5036/files/81902967933.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/33322747158.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74731072541.pdf
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/biogeochemistry_an_analysis_of_global_change_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7696/files/tanuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/rofutadikana.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_off0002bed9.bin
d834cdc4f215e075036777dbdde8ebd7f07f240c7aa3d0cea29f387c43a1a13f
pdf-font-stream PDF embedded font (sfnt) at offset 0x2BED9 5432 bytes
font_01_sfnt_off0002d15a.bin
a72d86f882785c8b728ac3012509b88b903cf0a2c13cb1a55797e9d7b84c6df3
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D15A 15296 bytes