Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f6e39bea50f53f…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 03:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6115fb82f90e9c8df9328c384090050 SHA-1: fe19aeb95ae0072b4f2bb991c7af5eb01d5a0526 SHA-256: 36f6e39bea50f53fca8b4e3a5fb507162aa1b3906c1d71031717d11233f8e3e9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body contains text related to 'Canon digital photo professional windows 7' and includes the malicious redirector URL, suggesting a lure to trick users into clicking potentially harmful links. The presence of a link farm further supports the malicious intent.

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=canon+digital+photo+professional++windows+7
    • http://files.prayzart.com/uploads/1/3/2/8/132815807/fexugijuxitaxugusov.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/65118252570.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/muwuraniwebipipozefa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/23430571048.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/53858184797.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/89782865680.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0428/files/28295758770.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/libuzupowofaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/spanish_to_english_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/basic_english_grammar_book_1._coviet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaxolaxowixinetubosi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/49279627138.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1782/files/36852862204.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/74868967857.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/57622762049.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006431.bin
1234470ba23feabbec2d41b21381211be78c13460ada44dcbd1e238cc0e14425
pdf-font-stream PDF embedded font (sfnt) at offset 0x6431 5380 bytes
font_01_sfnt_off00007696.bin
c75b83c58aee49c988b19d971f215515015a76e79c6212aba0e2a11b1a2da3bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7696 10416 bytes