Malicious PDF — malware analysis report

Static analysis result for SHA-256 5783b241909850bd…

MALICIOUS

PDF

66.3 KB Created: 2020-08-08 16:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e755b9308564c32c0446c6e8363e4e34 SHA-1: a8dc909d77c13ae0e71c9284d456dcb9563674bc SHA-256: 5783b241909850bd3df014273c69dc652a47b5bb8cf3a69929ac34b8c2b218cf
154 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 a PDF link farm heuristic, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=barcelo+riviera+maya+map+pdf', suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=barcelo+riviera+maya+map+pdf
    • http://files.funinstruments1.com/uploads/1/3/2/6/132695663/rotijegomububa_gikesitu.pdf
    • http://files.greyhoundadoption.ca/uploads/1/3/1/8/131856134/vereb_vumigirex_vixovezadojatok.pdf
    • http://files.joshuacolecampbellstore.com/uploads/1/3/0/7/130776150/xates.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/7010/files/jipimutaripat.pdf
    • https://cdn.shopify.com/s/files/1/0429/5160/6435/files/50436608848.pdf
    • https://cdn.shopify.com/s/files/1/0429/2299/9964/files/1819803760.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/nidoxal.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3811/files/mamesobifikute.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/70676727797.pdf
    • https://cdn.shopify.com/s/files/1/0437/3653/1095/files/reading_comprehension_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/64125648194.pdf
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/mapa_carretera_austral_copec.pdf
    • https://cdn.shopify.com/s/files/1/0437/9043/4456/files/9368899801.pdf
    • https://cdn.shopify.com/s/files/1/0435/6446/6335/files/basel_2_full_pdf.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_off0000c7bb.bin
78515b84b1a3407db0ff913c646aac3d12cd9685ae20b9f3992c8efb05a63792
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BB 5336 bytes
font_01_sfnt_off0000d9dd.bin
630aed3384959e5a74456d01aa33decf4ea1ae68732ecd49bf6114ddc4d28391
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DD 10024 bytes