Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fd7c6520287a18…

MALICIOUS

PDF

48.7 KB Created: 2020-08-12 20:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a13e8be641bd4d3eb2fc4d4711a5a8ae SHA-1: 74a85f83c34c76a647ad8fbd6652291e3bc13d1d SHA-256: a4fd7c6520287a1841dd64872c010a18351e14fdd96bcd62a900226a29a6494c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a PDF link farm. One of the primary links directs to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=canard+enchain%25C3%25A9+pdf+gratuit'. The document body, though heavily obfuscated, also contains this URL. The presence of numerous links, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign PDF files.

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.ru/pify?keyword=canard+enchain%25C3%25A9+pdf+gratuit
    • http://files.movitzgroup.com/uploads/1/3/1/8/131857580/lisakikiru.pdf
    • http://wefamateb.hollywoodrobtravel.com/uploads/1/3/0/8/130813834/molofi.pdf
    • http://files.bombstract.com/uploads/1/3/0/8/130813899/2634081.pdf
    • http://wekulow.activ8her.org/uploads/1/3/2/6/132682717/45275f1fdc6dc5f.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/mubovanawisiwujotipipi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1416/files/biologics_ibd.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/array_in_java_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/movoxebaraxovomogilegizok.pdf
    • https://cdn.shopify.com/s/files/1/0433/4967/2091/files/zedajerogozelilogujana.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3669/files/lajezimisesuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/38565417552.pdf
    • https://cdn.shopify.com/s/files/1/0430/0298/6659/files/fafugeremesejapamasim.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3294/files/easy_worship_songs_chords.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/airtel_digital_tv_channel_list_with_price.pdf
    • https://cdn.shopify.com/s/files/1/0434/2982/2631/files/visualize_this_nathan_yau.pdf
    • https://cdn.shopify.com/s/files/1/0433/4426/5366/files/google_sheets_page_break.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/25085871933.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_off00007a9f.bin
8053efdce1a788152a897eddc384db4bec1c3a7ef15cdd46e9711921cb225b95
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9F 5256 bytes
font_01_sfnt_off00008c36.bin
f514eef5c82dd1f3fe774f4c07f8a15c1119e4be47e13dde3d254f19c973d315
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C36 12508 bytes