Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3da205f9f10b9de…

MALICIOUS

PDF

40.3 KB Created: 2020-08-16 17:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c981f4f79330b2afbf81ed9d94ff6f51 SHA-1: 9ad18afcc36a3855fc81dd1b62c0ee63ba7f786f SHA-256: e3da205f9f10b9de8edc50e456c2e1a4363826b46e061b92fd10a7783cfb767e
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to ttraff.com, a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Arcgis network analyst extension free' and the malicious URL, suggesting a lure for users seeking free software. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed to redirect users to harmful 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/pify?keyword=arcgis+network+analyst+extension+free
    • http://files.actonhistoricalsociety.org/uploads/1/3/1/8/131856134/kisakinibokif.pdf
    • http://files.drpatelinternalmedicine.com/uploads/1/3/2/3/132303189/fd41224853c.pdf
    • http://files.inversitymodelmanagement.com/uploads/1/3/2/3/132303359/753f494073213.pdf
    • http://files.nzethnicwomen.org/uploads/1/3/0/8/130813738/d7aaddd383bca1.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/bubejeduxusizoxaduxiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/76323890808.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9915/files/23036500547.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/18722332260.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/84357459976.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/nelafodoxator.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/67531030759.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/36714381985.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/52695970990.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/bofujinetaralepijina.pdf
    • https://cdn.shopify.com/s/files/1/0445/6385/7572/files/71752493546.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/jexololizogixulojekusizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6658/9335/files/pcaob_auditing_standards.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_off00005fc4.bin
54af655749d2767d3812c686be27b6625b6045723467821ad61d16adbb946dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC4 5364 bytes
font_01_sfnt_off0000722d.bin
70e243af63f5cfb068e77a28413d4f35db11629ad091df74d1b499beb00b8999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722D 9964 bytes

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