Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fdd9b005f740f6…

MALICIOUS

PDF

61.9 KB Created: 2020-08-08 20:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a246ee5f2327ee4f9aa6669c55cc9a8 SHA-1: 7004d6792421e1c73d575de4b4ba15c74b339adc SHA-256: 73fdd9b005f740f67bac7c86cc2f5c56d78e23497e75301873c57f90323d121c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into clicking it. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the malicious URL is the primary indicator of compromise.

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=bactericidal+and+bacteriostatic+antibiotics+pdf
    • http://files.thecoachmensclubhouse.com/uploads/1/3/0/7/130739690/5ddd5ad2ea.pdf
    • http://files.advancelabordaypicnic.org/uploads/1/3/1/8/131857465/3568262.pdf
    • http://files.sarahwatercolorart.com/uploads/1/3/0/7/130739704/a694910985243.pdf
    • http://files.gilliantorckler.com/uploads/1/3/0/8/130874629/gomenevidi-kinepowa-xasokipa-xupuzateseroji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/73514482079.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/ladunonaluneripine.pdf
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/pijijiterolopej.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7116/files/vureputawegeka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/2004_polaris_sportsman_500.pdf
    • https://cdn.shopify.com/s/files/1/0439/3854/5819/files/pipiparagajetimibo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2579/9067/files/93990120430.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3496/files/1462224725.pdf
    • https://cdn.shopify.com/s/files/1/0437/7467/3057/files/jeredikemerozuvuvev.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/82755996587.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/terij.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a014.bin
354554ce638a85385a675fcbff9d0217ba3fd0533ff77076b96bd79dc70bb310		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA014 5336 bytes
font_01_sfnt_off0000b240.bin
7f66c43ddc0f8f2d4bb1f054b4f9aa857752de922540052c8ecc85e378407d04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB240 9992 bytes
font_02_sfnt_off0000d498.bin
f77972c353b33f73bb6c165739ca4c01067b7b527bd9d028a27aa4245e14d088		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD498 16208 bytes

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