Malicious PDF — malware analysis report

Static analysis result for SHA-256 023a2fb99e081283…

MALICIOUS

PDF

49.8 KB Created: 2020-08-07 17:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53ec6581756da9420452f4d02e751fdf SHA-1: 755434dd5ff479ac2538369dd7997a3982a8f6a6 SHA-256: 023a2fb99e08128353f247c7362f86132814a0283e5dfb8a425c42e1a794ca74
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a magazine article. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm intended to obscure the malicious redirector.

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=ubqari+magazine+april+2020+pdf
    • http://files.butsavageracing.com/uploads/1/3/0/7/130776175/wivawopuvil.pdf
    • http://files.polarisportfolios.com/uploads/1/3/1/0/131071056/powamigolu-kewoso.pdf
    • http://files.sgrhoboston.org/uploads/1/3/1/8/131871535/27cb8bffc691703.pdf
    • http://files.acuartistry.com/uploads/1/3/2/6/132681415/2e53e.pdf
    • http://files.stevescustomcarpentry.org/uploads/1/3/2/8/132816041/gekovisetosaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/65230128835.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/kesenuwamufopogeguwam.pdf
    • https://cdn.shopify.com/s/files/1/0436/4396/1494/files/71175243711.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9658/files/30144276289.pdf
    • https://cdn.shopify.com/s/files/1/0439/5902/5822/files/54109403474.pdf
    • https://cdn.shopify.com/s/files/1/0433/3204/2920/files/dasixux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdf
    • https://cdn.shopify.com/s/files/1/0449/1457/3467/files/applied_linguistics_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/10110771716.pdf
    • https://cdn.shopify.com/s/files/1/0436/6280/3097/files/fm_21_76.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/96818132292.pdf
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/ansiedad_y_depresion_durante_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/rimipozavederenunubeka.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d07.bin
7d43bf0200db3e4ebbdf6e3003e506e9173573e87b971a0fd5f88becb0017a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D07 5764 bytes
font_01_sfnt_off0000708d.bin
5fd53e2058c4f5d98b70161d670f1e42036942552fef68ac845a5e47e2d7f715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 2604 bytes
font_02_sfnt_off00007bae.bin
e0308e9fdfd31f55a18559cbbd0e5e1807001234b7c6c4f6fa556e7042525b10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAE 9896 bytes
font_03_sfnt_off00009ddb.bin
01319aa4ded363944cd41e84055cf5699ad285532c28174002c851fb664427dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DDB 18104 bytes

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