Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef31278ff8d992b…

MALICIOUS

PDF

51.8 KB Created: 2020-08-21 07:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05489315bcf0dfd372bd56d0843a9a77 SHA-1: bf8cbc2e24373efb56d098c7c335bb0aa0a51881 SHA-256: fef31278ff8d992b61dd3e366af9ccff1880bba9a1fc42009377f3801bccc3d3
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to 'Android mobile phone reviews 2019' and the malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a malicious redirector, and PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm for SEO manipulation or traffic redirection. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=android+mobile+phone+reviews+2019
    • http://pokokoxa.bernedoodlebreeder.com/uploads/1/3/1/6/131606260/26095.pdf
    • http://files.charlietaylorphotography.com/uploads/1/3/2/7/132741241/sajodolibububal.pdf
    • http://files.libbyfarrelly.com/uploads/1/3/1/3/131398091/vabijoratibis.pdf
    • https://cdn.shopify.com/s/files/1/0437/5068/6874/files/golebegomorilipifusagina.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/49243455871.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/cours_complet_sur_l_algorithme.pdf
    • https://cdn.shopify.com/s/files/1/0459/9139/5485/files/xusalenexokoxukigigo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/biochemistry_for_medical_students_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/7802/9213/files/oxford_ib_diploma_programme_biology_course_companion.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3830/files/ecological_pyramids_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/dafuwavigar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/80825708570.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/shopify_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/warasanabepolobigasavo.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_off00007dff.bin
9d63de5fe1876a76754f3c1bffdaad208fc5b846c199185a694b4704eb7347a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFF 5460 bytes
font_01_sfnt_off00009059.bin
ea1fe644502cc86955f79e6bc2ebc45ce49a4012a08993756e1e78e29120ec9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9059 10364 bytes
font_02_sfnt_off0000b3d7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D7 4324 bytes