Malicious PDF — malware analysis report

Static analysis result for SHA-256 2195facd7086f8db…

MALICIOUS

PDF

46.5 KB Created: 2020-08-20 20:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01450df6f161b315ebea20144f1ad3b0 SHA-1: 5e520bc20797d5c91bc42fe5a7e9a2dd97c6c793 SHA-256: 2195facd7086f8dbfea2917c3558d95f74d332a7fbd7eafcf579f9de2e6f6f3b
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for phishing or malware distribution. Specifically, it links to a redirector URL (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect users to harmful content. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially improve search engine ranking for malicious content or to obscure the final destination.

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=acoso+escolar+libros+pdf
    • http://files.actg.org/uploads/1/3/2/6/132681611/nazedededibabuk_dofov.pdf
    • http://files.mathewsfoto.com/uploads/1/3/0/7/130775413/xuzud.pdf
    • http://files.tillerridge.com/uploads/1/3/0/7/130738799/firewudale.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/zolar.pdf
    • https://cdn.shopify.com/s/files/1/0438/9535/7595/files/gmp_training_material.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/cae_advanced_gold_exam_maximiser_with_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/7559/9524/files/87905258480.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/puredixediderajeviw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/kekafativavenisoleg.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/35145256506.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/austin_public_library_overdrive.pdf
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/23172545805.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/36755544937.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/anatomy_of_mri_brain.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/63447226154.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/bhagavad_gita_slokas_in_telugu_with_meaning_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0448/0122/8951/files/vigimanub.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/toefl_reading_practice.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_off000074b2.bin
85b231022a91aea80f645af68dbf87c0a570cdff524974c9852918a2aafb3a0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B2 5276 bytes
font_01_sfnt_off000086a4.bin
8b8bff8a081c0e9fc8178ceafdb1dd8d14e1645e1f2d0109b45af15c045061ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x86A4 11356 bytes