Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f253b67db74d232…

MALICIOUS

PDF

74.5 KB Created: 2020-08-14 14:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdb46d1997485e5f1d2bef6186926ec2 SHA-1: b37a1174b75e8857ba4047582ce33f2f8be4386e SHA-256: 1f253b67db74d2323a62e3ea5072a2257f33ff8a794d956f115eb301ac73798d
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at "ttraff.com". The document body, though heavily obfuscated, contains the string "topology definitions pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to distribute malicious content.

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/wb?keyword=topology%20definitions%20pdf
    • http://duneguwew.jillseidnerinteriordesign.com/uploads/1/3/2/7/132740669/radapevabejaviv.pdf
    • http://files.vyod.us/uploads/1/3/0/8/130874231/8ce935bbc.pdf
    • http://wegon.jamestruslerphotography.com/uploads/1/3/2/6/132681218/2467988.pdf
    • http://jekirevo.ulveling.com/uploads/1/3/2/6/132680813/2ae803.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/94685179241.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/76670653271.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/bevok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/dodaguvoropozevibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/git_pull_override.pdf
    • https://cdn.shopify.com/s/files/1/0431/7711/5812/files/project_report_on_vermicompost_unit.pdf
    • https://cdn.shopify.com/s/files/1/0446/4531/8819/files/medication_administration_through_enteral_feeding_tubes.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/580169519.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/bootstrap_3_media_queries.pdf
    • https://cdn.shopify.com/s/files/1/0437/0333/7115/files/94762346289.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3899/files/kuwas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/causes_and_consequences_of_ww1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c767.bin
47be091f27901823538b7062ea926ff9c9af672e9526715276ef49d5995aec68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC767 4952 bytes
font_01_sfnt_off0000d869.bin
b992b615398dd569cfa2451df7f2b1d1fdc0cb1e279a54649f7c6e0ef8ac1ffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 13560 bytes
font_02_sfnt_off0001040b.bin
277acd648cba9b0e3d011dba6e037f4e8da0e2f617cb6e17748d4dbe755c5b05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1040B 16624 bytes

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