Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4f39a18864ef6e…

MALICIOUS

PDF

54.2 KB Created: 2020-08-12 08:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b91b91546c226090707e0baf8567f14 SHA-1: 020fff1f181815eb3a3f8139d6209350064e153b SHA-256: ed4f39a18864ef6ee6de5e5a2048b6d05699f9df1b12f8cf34b772f36c71787a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.cc/pify. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious content under the guise of providing a free PDF. The ML classifier strongly supports the malicious nature of this document.

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=smoothies+recipes+for+weight+loss+pdf
    • http://files.mysmileprogram.com/uploads/1/3/0/8/130873758/vapujezolode-mupowirijugokun.pdf
    • http://files.tassaace01.com/uploads/1/3/2/7/132740930/vamiwibogi.pdf
    • http://files.arnprioranimalhospital.ca/uploads/1/3/0/7/130740517/a30d1b44.pdf
    • http://koredekek.reiver.life/uploads/1/3/2/6/132682787/9465538.pdf
    • http://files.christ-presbyterianchurch.org/uploads/1/3/1/3/131378923/fabuwugajakizer.pdf
    • https://cdn.shopify.com/s/files/1/0429/8371/9071/files/darth_plagueis_livro_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/17809561948.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/zutugetorexeforiputus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/biwufujuduwegix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/32760518478.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/partitur_sing_alleluia_to_the_lord.pdf
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/94725124061.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/anatomy_and_physiology_coloring_workbook_chapter_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/54969600499.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0440/1466/5886/files/zigukafapajemorako.pdf
    • https://cdn.shopify.com/s/files/1/0447/9827/9841/files/bed_bath_and_beyond_mission_statement.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_off0000957c.bin
e882c30c9eaa740339b1f513e8e933d0322f49198629f566905732aa47e9dedc
pdf-font-stream PDF embedded font (sfnt) at offset 0x957C 5552 bytes
font_01_sfnt_off0000a84f.bin
38e2314f5fdb86aae94bec9c842d0a380dda785e7a331be751e4cfcb1ea03d1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA84F 10260 bytes