Malicious PDF — malware analysis report

Static analysis result for SHA-256 7028f99b1fbe84bd…

MALICIOUS

PDF

45.3 KB Created: 2020-08-01 15:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14ed3b5e02cb89ecacd7bce1d17ff19a SHA-1: 240c447d7f62e44d9916b3d4e545fe2bd62424b7 SHA-256: 7028f99b1fbe84bded1ff7a7560421d7401d749dd756e0874eaa57126ded6562
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=enviar+mail+con+phpmailer'. Additionally, it exhibits characteristics of a link farm with numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting an attempt to lure users to 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/pify?keyword=enviar+mail+con+phpmailer
    • http://files.pinegrovecogop.org/uploads/1/3/0/8/130874318/de351d21ce3806f.pdf
    • http://files.whitelodgeownersinc.com/uploads/1/3/1/4/131437775/6482334.pdf
    • http://files.kenpodvd.com/uploads/1/3/2/6/132695329/nisufer-wefefifotedepe-webavolugajilo-judigalijer.pdf
    • http://files.promosareus.com/uploads/1/3/1/6/131606760/sipaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/70592118314.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/33455954351.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/11141375032.pdf
    • https://cdn.shopify.com/s/files/1/0431/8045/8144/files/95042496472.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6074/files/lugojetalaviperesagizup.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/petomilonogodibaxiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/37109645407.pdf
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/41954409506.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/vilukigawiwuboloworide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0994/1415/files/38076192606.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/fifeguwipuzaxebofawevurew.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/7010/files/jipimutaripat.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f1.bin
f855504f5deb8a6cee4debaeed7d0949980ec5ee2535beae4f7b01da61251bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F1 5012 bytes
font_01_sfnt_off00007ade.bin
f8dcd17597db05080addc07a9d5534a79d066b03a0a7ddd8c2474bcf508ed9a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADE 14288 bytes

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