Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe056494c3843cf6…

MALICIOUS

PDF

45.4 KB Created: 2020-08-08 22:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fdb88a71f92da9e9ad2e6d3d2cbb537 SHA-1: b413946ea52ee3e1f0a5ea43783ebe85bbfd4aa1 SHA-256: fe056494c3843cf6949a291b98239dda7be528e0eb1a0ea20bc2280b10e9382e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=respiraci%25C3%25B3n+aer%25C3%25B3bica+y+anaer%25C3%25B3bica+pdf'. Additionally, it features a PDF link farm with numerous external links, many hosted on cdn.shopify.com, suggesting a tactic to distribute malicious content or engage in SEO abuse. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious URLs indicates a likely phishing or malware distribution attempt.

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.com/pify?keyword=respiraci%25C3%25B3n+aer%25C3%25B3bica+y+anaer%25C3%25B3bica+pdf
    • http://jabafab.thehollywoodbuilding.com/uploads/1/3/2/3/132303035/dutofaziroba-wusakovijexipe-divapevu-vuniviv.pdf
    • http://files.webdevelopmentbuddy.com/uploads/1/3/0/8/130814874/5307760.pdf
    • http://files.jeffgerber.ca/uploads/1/3/0/8/130814124/vizuzubuvunoraxolof.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/assembling_and_disassembling_a_pc.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/36463328412.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/nremt_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/24509462822.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/semi_automatic_capsule_filling_machine.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/tivivofujidetilasuwikefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/acrobat_reader_download_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/behavior_management_strategies_for_preschool_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/munap.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/bixojovejagoxagumojexiseg.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_off00007003.bin
5dc8470a3e3acac87824bc8e4d4bdbd4d98692f03c43ebd8e8e716655e3b4c85
pdf-font-stream PDF embedded font (sfnt) at offset 0x7003 5504 bytes
font_01_sfnt_off00008291.bin
30558bc798ebd14bf41f233730862acbfc2d0bb8d16df6dd7a5a96a6987aa937
pdf-font-stream PDF embedded font (sfnt) at offset 0x8291 10956 bytes