Malicious PDF — malware analysis report

Static analysis result for SHA-256 749608b2b3a89b70…

MALICIOUS

PDF

39.5 KB Created: 2020-08-31 17:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c67d35939e3621af45d51cce5f09c13d SHA-1: f54323aa764627368676ca3d26b1cd093b709a45 SHA-256: 749608b2b3a89b703b3b9b4f584cbd441be5717d507b7bd22939e2a9a30d62b1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely for phishing or malware distribution.

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.ru/wix?keyword=kalyanram+kathi+songs++telugu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/pendulum_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/11204253996.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/sample_marketing_plan_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/running_android_on_my_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/zinijolu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/half_baked_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/52340877849.pdf
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/wejukirezaburupaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotalufakelani.pdf
    • https://cdn.shopify.com/s/files/1/0429/7759/1449/files/greeting_card_factory.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/12583459327.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/caqh_attestation_statement_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/hashimoto_s_diet.pdf
    • https://static.usrfiles.com/ugd/2f07a1_bbf733c643084b318d8ec4528b0e7014.pdf
    • https://static.usrfiles.com/ugd/d775a9_ccae48a39e144f56918e0241f2dcde56.pdf
    • https://static.usrfiles.com/ugd/2f07a1_1dfd980a196b42b0a12bbd0e1699b5b4.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_off00005d83.bin
55d77d76aa3aac3d8d0a5b575acde5aa5dbc0a883ef6e45104833908c24247b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 5232 bytes
font_01_sfnt_off00006f2e.bin
068062d2aeff84cae311aa4d3cfd7e8c71848060ddd1d1ec6081bdb79e9237ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2E 9972 bytes