Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c856970a1f8a944…

MALICIOUS

PDF

49.0 KB Created: 2020-08-09 20:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 974a29eb9e80604c562b0398430487c9 SHA-1: dd2c151e91ff52c957cfbc134aa79567fd2b7c00 SHA-256: 8c856970a1f8a944d35aaa5578667aa491522c0a4cb0cf71b2544dfacff08397
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing a large number of embedded URLs pointing to external PDF documents. One of these URLs, 'https://ttraff.cc/pify?keyword=mariage+d+amour+pdf+chopin', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute content or lure users. The primary intent appears to be SEO manipulation or redirection to malicious sites through a mass of linked PDFs.

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=mariage+d+amour+pdf+chopin
    • http://files.johnmurphygroup.com/uploads/1/3/1/6/131606348/mezadegivadado.pdf
    • http://files.allisonattitude.com/uploads/1/3/1/8/131872087/dudobikuluru.pdf
    • http://sozafo.lindagreenup.com/uploads/1/3/0/8/130873851/fa6de.pdf
    • https://cdn.shopify.com/s/files/1/0446/8637/7113/files/basic_python_programming_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/6559/8364/files/78857358116.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/how_to_draw_a_5_point_star.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/43612045397.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/24436323612.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/tewarejugusalajogot.pdf
    • https://cdn.shopify.com/s/files/1/0439/2573/3531/files/menace_d_accouchement_prmatur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/zatoposawosifawunure.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6822/files/nisegipabe.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/kojobibizedufanejavubote.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0796/files/lafezofitufo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2209/7304/files/kugetaduxilenepif.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/32556996311.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_off00006596.bin
17961f5f6c15532f5c02309d9f6bdb6bbced8e9fa150b898bba3518a8d239d06
pdf-font-stream PDF embedded font (sfnt) at offset 0x6596 5364 bytes
font_01_sfnt_off000077be.bin
c0e5993b3a060bf80e03990f79cd389e114b5217bcd2b437090fa5c22e14536a
pdf-font-stream PDF embedded font (sfnt) at offset 0x77BE 15944 bytes
font_02_sfnt_off0000a1f0.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F0 16120 bytes