Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b02a7d96ab71c94…

MALICIOUS

PDF

64.8 KB Created: 2020-08-25 16:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08f641e5c16c5651e44d20c1c9c7a305 SHA-1: 3272260c9cb22ae35e05995e762b8e73ffd9c626 SHA-256: 1b02a7d96ab71c9492504e05827c1c87ef24727fd14011ffa331497cf5c1bf7e
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=amadeus+ticketing+entries+pdf, which is likely used to redirect the user to a malicious site or initiate a download. 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.cc/pify?keyword=amadeus+ticketing+entries+pdf
    • http://fimipi.jasonkinneyband.com/uploads/1/3/0/8/130814297/natufapudavalilafi.pdf
    • http://xilaxezag.lforlupus.com/uploads/1/3/0/7/130775451/2663980.pdf
    • https://cdn.shopify.com/s/files/1/0460/7973/8020/files/ean_jan-_13_font.pdf
    • https://cdn.shopify.com/s/files/1/0438/5079/3122/files/ciao_adios_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/67955895002.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1565/files/design_and_analysis_of_algorithms_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/8748522160.pdf
    • https://cdn.shopify.com/s/files/1/0439/9883/8942/files/zufaxopuzibaviget.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/lusizopapatovoxisige.pdf
    • https://cdn.shopify.com/s/files/1/0438/3644/0733/files/consumer_reports_best_cars_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7913/0531/files/66242323787.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/xasebodazojajebojalusulod.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_off0000bfe2.bin
9c34c84efb7862e8dfb2f0e7674af2b99d485709cfb7ba686c69a32065176743
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE2 5496 bytes
font_01_sfnt_off0000d27d.bin
07ac00c4e6b5dae09a7f17d4a29087595f937c77d2b950a6a63020a00c9b10bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xD27D 10692 bytes