Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec3e9cd24220b74…

MALICIOUS

PDF

42.3 KB Created: 2020-08-23 21:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d64ae89570adb1d9bdc08a4cd26cd3a4 SHA-1: 998dfd69a77ce6483286eb67a894bf226b6dbc06 SHA-256: 6ec3e9cd24220b7417c04fa669ca89ac99e8eed6d84aac1a7b074c74c30fc278
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for phishing and malware distribution. The heuristic firings indicate the PDF is designed as a link farm, likely to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting potentially 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.cc/pify?keyword=ardisia+plant+information
    • http://files.osspto.org/uploads/1/3/2/8/132815748/migujinegu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/administrao_estratgica_hitt.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/6th_grade_vocabulary_words_and_definitions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0457/8652/9948/files/baua_comedy_latest.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9522/files/juxuxenenopevamiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/8466/0380/files/greenhouse_effect_information_wikipedia.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/zujesasexoborotoxu.pdf
    • https://cdn.shopify.com/s/files/1/0459/7071/8887/files/movie_admission_ticket_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/7863/2095/files/behind_blue_eyes_song.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_off00006867.bin
42fbcbb52fd948edc7753b8b82473765929e0be301dff77385e4f3cc0330c15f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 5176 bytes
font_01_sfnt_off000079e6.bin
f5e2420e4ee24e5b41c356ce87deb443f3eb1278201b30f58711a6c45427c26a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E6 10360 bytes

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