Malicious PDF — malware analysis report

Static analysis result for SHA-256 64412d2732c92166…

MALICIOUS

PDF

60.5 KB Created: 2020-08-20 05:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8c7c87ebcad58a73fb2811244b5d509 SHA-1: addc561c4f816b5d6c9f41ad99a11ac2788aa102 SHA-256: 64412d2732c9216624518bd45e812d41b0c92397df7c3ec8f53e993806841b6e
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract search engine traffic. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be tricking the user into clicking the malicious link.

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=basic+characteristics+of+management+information+system
    • http://files.waikatopqg.org/uploads/1/3/2/6/132682327/9489675.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/famulogux.pdf
    • https://cdn.shopify.com/s/files/1/0465/9645/6613/files/hangman_cool_math_games_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/vetebevenelivupekaletu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/celebration_of_life_service_outline.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/adverbial_clause_of_purpose_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0438/9175/3115/files/23224858999.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/biology_notes_spm.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/que_es_la_musica_popular.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/cypress_command_line_interface_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/tatobe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6088/6694/files/fovamububifexejerepugijuw.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_off0000af1f.bin
2bdbf17f5bfb674e5d6428f6ca87336bfefcd712186209f69112de25c7675b8f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1F 5412 bytes
font_01_sfnt_off0000c166.bin
944e62fdbc520a6ac5d5f1c08c595f4668b7360225df1290d8fbb1ec5edc2e10
pdf-font-stream PDF embedded font (sfnt) at offset 0xC166 10240 bytes