Malicious PDF — malware analysis report

Static analysis result for SHA-256 15093bd564e58040…

MALICIOUS

PDF

42.8 KB Created: 2020-08-05 10:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83084026f9fc66a4a697e4483c660eb7 SHA-1: 065127c1a517a3be9d334302a3b278646a69b1ce SHA-256: 15093bd564e5804003704a9e71aa054f943e92d17f419765e5fd53d177d3b0a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body itself contains the same suspicious URL, suggesting an attempt to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=abscesso+cutaneo+tratamento+pdf
    • http://files.mukewatercreative.com/uploads/1/3/1/4/131410158/c9d5fabd451e2a1.pdf
    • http://files.christinebushroman.com/uploads/1/3/0/8/130874254/a033d.pdf
    • http://files.terracepipesanddrums.ca/uploads/1/3/0/9/130969984/piwefifegetote.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/dynamic_programming_sequence_alignment_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/lafiwijuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/exploring_lifespan_development_1st_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/datakubuzolixuli.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/pupulemupunexixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1866/files/makalah_medan_magnet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/toroganivulirefexuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8003/2160/files/35398917705.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/xudewupipetalulenupo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/75498887747.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a0b.bin
adf0b4150436f8309cf673cd44d2e8971af2d1371c542c7131696b5f81790560
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0B 5396 bytes
font_01_sfnt_off00007c4d.bin
474802ed4061515f30f1b24f478a174762e33025b7e4e5a5d650a3efa25cfae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4D 9944 bytes