Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e373ff64831d97a…

MALICIOUS

PDF

68.8 KB Created: 2020-08-22 21:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15751c0acb9920a674a58bc31f377b7f SHA-1: aec2c8b17b162cf895e4d32b2d067df36db83b77 SHA-256: 7e373ff64831d97afbfeca3bf1d21ffef26e20598a14a48f7204a06436ebb859
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Tratados internacionales ambientales pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to 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.com/pify?keyword=tratados+internacionales+ambientales+pdf
    • http://mirik.weareworking2gether.org/uploads/1/3/2/6/132681352/4e99fe0d05760b.pdf
    • http://files.pacificstudiodance.com/uploads/1/3/1/8/131859993/6666536.pdf
    • http://files.hannahbroderphoto.com/uploads/1/3/1/4/131438190/42fcc84039.pdf
    • http://naregapox.jannamparker.com/uploads/1/3/2/7/132710745/ruganokutoribusev.pdf
    • http://files.mbsmensclub.org/uploads/1/3/1/3/131381976/8900605.pdf
    • http://naregapox.jannamparker.com/uploads/
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/26749435065.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/xbox_360_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/dapukolas.pdf
    • https://cdn.shopify.com/s/files/1/0463/3110/1345/files/finunelemokapukejetawu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4566/4406/files/jepugetosim.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/shelf_life_of_bakery_products.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7456/files/44094974051.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/kia_service_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c071.bin
b4ad2aeef713571cc3cc73268f06d56e8953fcfe7f5a421faeeaceb58ebb40aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xC071 5180 bytes
font_01_sfnt_off0000d1eb.bin
078dc0c6a290fec7bf89b3f06fecbcb53fefc98a4d7a912c05645f5ba43642b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EB 11072 bytes
font_02_sfnt_off0000f622.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF622 4324 bytes