Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1be5bcbe2bf554…

MALICIOUS

PDF

119.7 KB Created: 2020-08-17 07:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebd3285e4e4cc3d6110a7b4444f60d0f SHA-1: 42c4e23e445cb731b592fd377ef48af4e88e08f3 SHA-256: ec1be5bcbe2bf5540de4aa0d6377a61703cd2d8dc50029288f35bc05d3e838c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware download site. The document body, though heavily obfuscated, contains the same URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=harley+quinn+comics
    • http://files.dmotree.com/uploads/1/3/0/9/130969966/jamakanadowo_vagarosagib.pdf
    • http://fomuwi.ivmana.org/uploads/1/3/1/1/131164250/botabujojativom.pdf
    • http://files.laurieburtonart.com/uploads/1/3/1/6/131606968/3147570.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/pafepigiviju.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/jikukopitefuwubegako.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/factorisation_of_cubic_polynomial.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/ti-_30xa_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/9627589270.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4080/files/75636528250.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/61475886511.pdf
    • https://cdn.shopify.com/s/files/1/0435/0525/4566/files/programming_algorithms_and_data_structures.pdf
    • https://cdn.shopify.com/s/files/1/0461/4337/3480/files/33284206825.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a22.bin
4eaca5af35c10619bc9b52505ff8da7e621a64e3fb59bcd0e22d6e1211aa6a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A22 3264 bytes
font_01_sfnt_off000165dc.bin
f52f6c821bdae23e06d8bad61027770149dd41befa2bff04637cb44b8cdf7357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165DC 4936 bytes
font_02_sfnt_off0001767d.bin
db10b07aa1ba911afaf060b12e2cde8c70dbbf9941f30369d108722010ce9547		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1767D 1648 bytes
font_03_sfnt_off00017ec7.bin
a48b0388ac4896b70a65d82e16fe0e569f59e08d59aaa47878833381be6fe813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17EC7 15236 bytes
font_04_sfnt_off0001ae22.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE22 16036 bytes
font_05_sfnt_off0001c28b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C28B 4324 bytes

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