Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a2e66dc4501b5b…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 01:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd827d7754e740490afca18b0c46c4a1 SHA-1: 18e289b20bdbe01e8461b415b324377a9d91d10f SHA-256: f8a2e66dc4501b5bacc928a44e15b0048753eb8b2d23f982503856ea4e07eef6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The primary lure appears to be related to 'Arches national park trail map pdf'. The ML classifier strongly indicated maliciousness, and the link farm behavior is a common tactic for SEO poisoning and distributing malicious content. No scripts were extracted, but the PDF structure itself is weaponized to redirect the user.

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=arches+national+park+trail+map+pdf
    • http://files.chiyoungkim.com/uploads/1/3/2/6/132696580/8dea2f4da5.pdf
    • http://files.mindbodyhealthnurse.com/uploads/1/3/0/7/130776218/semokuzixupegisegonu.pdf
    • http://files.clevelandpropshop.com/uploads/1/3/0/7/130740563/9802076.pdf
    • http://files.renaissancesingersretreat.org/uploads/1/3/0/9/130969999/9275181.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/62532954798.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/6304709753.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/diruvaxopekefumisuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/solejojaboxedagabaru.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/put_animated_gif_in.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/62096554572.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/how_to_ocr_a_in_adobe_acrobat_pro_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3607/files/zegugaluputatuwujudofex.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/maths_aptitude_test_for_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/las_clases_sociales_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/paxakabatisutizip.pdf
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/vcf_file_to_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006356.bin
7687366fcbea799a7c7339d3cbadab9f7501f8706b45ad957344a147b0689639
pdf-font-stream PDF embedded font (sfnt) at offset 0x6356 5236 bytes
font_01_sfnt_off000074eb.bin
0b39afe20d978081bfed407b386ca015747bc626374bfb091c9e91a90d612389
pdf-font-stream PDF embedded font (sfnt) at offset 0x74EB 10088 bytes
font_02_sfnt_off00009773.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9773 4324 bytes