Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78d6c50f253fef8…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 05:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03be1badc0a94a6248407a696d6e9224 SHA-1: 6229b3079ad6e32db28758f21621420cbf839d34 SHA-256: a78d6c50f253fef82b368ca951d08eda2e10cf065c40e3abd25fd7837222552d
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a download button, intended to lure the user to a malicious site. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=nh+dmv+accident+report+form', which is flagged as a known malicious redirector. Additionally, the PDF was found to contain a link farm pointing to external PDFs, with the first URL being 'https://cdn.shopify.com/s/files/1/0431/4831/2738/files/electronics_projects_ideas_for_engineering_students.pdf'.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=nh+dmv+accident+report+form
    • http://files.dandelionkisscustomphotojewelry.com/uploads/1/3/0/7/130775245/mezujolese.pdf
    • http://sidotu.allstudentslearn.com/uploads/1/3/0/8/130874482/rapev.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2738/files/electronics_projects_ideas_for_engineering_students.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/52929323444.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/amilum_jurnal.pdf
    • https://cdn.shopify.com/s/files/1/0439/4346/1032/files/41507827831.pdf
    • https://cdn.shopify.com/s/files/1/0431/8455/4141/files/agency_in_contract_law.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/messi_2016_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/compensated_attenuator.pdf
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/zagumibemu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/nada_value_guides_official_used_car_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/antenna_array.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/manual_de_microbiologia_veterinaria_vadillo_descargar_gratis.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_off00006d93.bin
f9b351108a2e292a1a08abf3243f2db2cd6c139e9bbee6ac9e63af74215bbdd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D93 5212 bytes
font_01_sfnt_off00007f2d.bin
64d163d983b0263cb84a28e7fc0dcc38f6da1a4d3a88635bac640dd0f5274ee3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2D 10568 bytes