Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be2029fc53099ed…

MALICIOUS

PDF

48.3 KB Created: 2020-08-09 03:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19d210156dd63659a6efefa7f5b8a2dd SHA-1: b36b063b405a23e5d762cb1e80de52d587bc983a SHA-256: 1be2029fc53099ed3ffd9f0333c9fcd7bcd137f821610ec894c27ca20bd02602
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a malicious redirector and link farm. It contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=autocad+plant+3d+help+pdf'. Additionally, a large number of PDF links were found, suggesting a coordinated effort to distribute malicious content or conduct phishing. The ML classifier also strongly flagged this PDF as malicious.

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=autocad+plant+3d+help+pdf
    • http://gunop.toejar.com/uploads/1/3/1/4/131454012/banexuvatu.pdf
    • http://jurapoka.yourvapesupply.com/uploads/1/3/1/3/131380058/2136281.pdf
    • http://files.parkmeadowhoa.org/uploads/1/3/2/7/132740965/kapewuj-nirumopukirid-nuxesozidafad.pdf
    • http://files.rbdist.com/uploads/1/3/1/3/131398308/letafetasugako.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/51294488307.pdf
    • https://cdn.shopify.com/s/files/1/0432/9612/9192/files/43209731392.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/97034302175.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/67034243599.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5988/files/nanocellulose_applications.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/67347347318.pdf
    • https://cdn.shopify.com/s/files/1/0432/8774/0576/files/tatuwewajoravozedoles.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/5016871227.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/fotadixufedinotuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/nirijuvedexuwadesoxuzuko.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/arabic_words_into_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/70565930881.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a3e.bin
f3456ad0a04d737d3b693ca749c572e5c7f81bae4cd2a206f0e21cc6ce899857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3E 4032 bytes
font_01_sfnt_off000058b8.bin
96ddd61716c67b2d4cf0056a3497b9cec646ee9f1241348c1a653b7d00385ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B8 5124 bytes
font_02_sfnt_off00006a33.bin
bb5b2675faf527307bd5655dd496932bd0782a3bc21e0ca617b9d4914647d9c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A33 14152 bytes
font_03_sfnt_off0000971a.bin
2a92fdc6bec5f4941eb7e4e2e215aea1dbd826385a35d4905abeba5ccfc5f1db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x971A 18276 bytes

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