Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4006df02207f0de…

MALICIOUS

PDF

33.9 KB Created: 2020-08-19 18:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1036a6c91c7a94ee5e73eb5e8aa71436 SHA-1: 5b7a4f33a67f5d6c3dc523069fbac87d400dce17 SHA-256: c4006df02207f0decd6e0320c122832c18d302d47f5f78619d0fe6e17f62cf5c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates these links are part of a malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the URL 'https://ttraff.cc/pify?keyword=kartonyono+medot+janji+new+pallapa', which is identified as a 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.cc/pify?keyword=kartonyono+medot+janji+new+pallapa
    • http://files.inrhispantry.com/uploads/1/3/2/6/132681969/e9805e7c974.pdf
    • http://files.chatteriemainecoonroswell.com/uploads/1/3/0/7/130738806/6066150.pdf
    • http://refabagek.pcsmith2.com/uploads/1/3/1/0/131070450/tofunop-zuvewe-potifopesaz.pdf
    • http://files.blueridgelanegermanshepherds.com/uploads/1/3/2/7/132710601/zorulapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/17268728851.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9180/files/50851035066.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/palmone_treo_650.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/jazozaruvitizubisumumure.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/xosorogavabisewetebap.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/dd_the_weeknd_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdf
    • https://cdn.shopify.com/s/files/1/0435/2383/4024/files/comune_di_campoformido_imu_2019.pdf
    • https://cdn.shopify.com/s/files/1/0449/5199/4536/files/fonctionnement_carburateur_moto_4_temps.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/99201088006.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/bitolevilobofu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/92721385260.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_off0000482d.bin
b8a6a0246a313de0570d71b97b9119a46de7c6da8b03e23509c2a96de2d828c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x482D 5164 bytes
font_01_sfnt_off000059c2.bin
1180bf31c94ebb9be4c93d569289cb6adec2461af7da5bacd7f2540da01e7dce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C2 9648 bytes

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