Malicious PDF — malware analysis report

Static analysis result for SHA-256 6432c288477c9f12…

MALICIOUS

PDF

54.9 KB Created: 2020-08-20 11:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6512f8bed4e26c8dc1d9ee3239e35788 SHA-1: cfb9742ef0d599fdd720a0c2482923e5313f6c08 SHA-256: 6432c288477c9f12a6ac3eaf4ec0fda0e7aceba213bfd438761a77fc5345825f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector pointing to 'ttraff.cc'. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=ancient+greek+grammar+book+pdf
    • http://files.gteanj.org/uploads/1/3/0/9/130969529/xojemofukugiluw_vuvelimuvo_dopaligebad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/27604999389.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/functionalism_and_formalism_in_linguistics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/dunesizonevejekij.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/56507654126.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/drupal_8_ajax_form_submit_example.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/gexanukipekonadizopup.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/carol_of_the_bells_pentatonix_partition.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/microsoft_office_for_mac_free_product_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000869f.bin
d7c2abe23bd4addc29487658e0fe3b6008c9918f0bb552269736e55c2ccd0f43
pdf-font-stream PDF embedded font (sfnt) at offset 0x869F 5248 bytes
font_01_sfnt_off0000984f.bin
05f4393b083112fca123ed789028af9df1bfb9a02aab48f11cafe5f074085c4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x984F 11992 bytes
font_02_sfnt_off0000c06a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xC06A 4324 bytes