Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7e41d25e8d39d4…

MALICIOUS

PDF

44.3 KB Created: 2020-08-23 09:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5e9d5aa369cdd2658b931de93c4a64a SHA-1: 677040529e7af203141dfc46350e1f9c6dfc1d18 SHA-256: 8a7e41d25e8d39d4115805058cee7b0cc5aa97c406242f6699f182ce4afdb186
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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify but point to potentially malicious content. The document body, though heavily obfuscated, contains the same URL as the redirector, suggesting an attempt to lure users to malicious infrastructure under the guise of providing nature wallpaper images.

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=nature+wallpaper+images+for+android
    • http://temamavax.sconaemporium.ca/uploads/1/3/1/0/131071288/16c9d3ec6b99.pdf
    • http://files.pineridgerv.com/uploads/1/3/1/1/131163867/2a0c7b1a.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/acca_f2_paper.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/80957385917.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/business_income_coverage_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/6219/8425/files/gatopage.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/toronto_accessible_design_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/8308/8547/files/pivupuxovekopunanidapabak.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/wunepajifukogoba.pdf
    • https://cdn.shopify.com/s/files/1/0447/9241/4369/files/fuwarowasakexupobukok.pdf
    • https://cdn.shopify.com/s/files/1/0434/1111/2092/files/wovolopalomezabugelusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0394/4858/files/gugemedojosenig.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/kiparabez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5842/files/mekejigemuzolelavagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/i_75_traffic_kentucky.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/aprende_ya_a_tocar_guitarra.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_off00006205.bin
8d3d0dabb1fdbe81f0b7ff469b20ba5430886fb41dd4a523db7485c95f60aa44
pdf-font-stream PDF embedded font (sfnt) at offset 0x6205 5304 bytes
font_01_sfnt_off00007410.bin
eae9b19ecaa0ce61e6c02f5eafe624dbf32d8254e4a17d40162b2e04a31df0f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7410 9924 bytes
font_02_sfnt_off00009602.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9602 4324 bytes