Malicious PDF — malware analysis report

Static analysis result for SHA-256 851d1cf2572f08ba…

MALICIOUS

PDF

54.8 KB Created: 2020-08-05 06:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30877a914846820e4a60fe5b66e920df SHA-1: 97112b91fc325dc58443ccf81ba7c0a452f82715 SHA-256: 851d1cf2572f08ba4114e87813da7611614475b67aedae0d0e2f9622b33c16f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though obfuscated, contains text suggesting it is a lure for educational material, likely to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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=equation+of+motion+class+9+pdf
    • http://files.anchorseminary.org/uploads/1/3/1/8/131871466/nefegutobus.pdf
    • http://files.kalaitzakisdesigns.com.au/uploads/1/3/1/3/131379789/bitagilotudoz_gujilixijew_tasopajorelakop_xomudobejev.pdf
    • http://files.eugenias3rdstreet.com/uploads/1/3/0/7/130775934/mizaroreranin.pdf
    • http://files.mtbreizen.nl/uploads/1/3/1/3/131383934/gifuza.pdf
    • http://files.acupuncturequeenstown.com/uploads/1/3/1/4/131482954/jotujenigureb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/66521182960.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/tamiwij.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/16916532653.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/54577415955.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/basizoxovolatowasurolab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/11351127942.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/16468672627.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/ansible_variable_precedence.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/75608787221.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/sezumirufavogepune.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/47032554994.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/59112293149.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a02.bin
ba03a5153406e069afe8e86442beb3a9178ab93e928ce2f009e1bfacff10935b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A02 5208 bytes
font_01_sfnt_off00009b9c.bin
ab0ed70997b691862e7e3ad17a16f0dec15fae572b9869a158b75d29271e8387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9C 10468 bytes
font_02_sfnt_off0000bf85.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF85 4324 bytes

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