Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c81f2d51366859…

MALICIOUS

PDF

38.0 KB Created: 2020-08-07 09:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b21b0bda46d5813fc431bbdbdcda0b0f SHA-1: 9fc8836f71b29da2942e60b417735061e25771a1 SHA-256: 41c81f2d51366859744ab78d7077afafbc45f9175a1be6596e71f177dc178571
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=ielts%20actual%20test%20vol%206%20pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though partially corrupted, includes text related to 'Ielts actual test vol 6 pdf', suggesting a lure to disguise the malicious redirection.

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.com/wb?keyword=ielts%20actual%20test%20vol%206%20pdf
    • http://files.mocommunitytrees.com/uploads/1/3/2/6/132680789/maruxewewate_gexaxojap_balobubibizewa_pidof.pdf
    • http://files.hammocksforhappiness.com/uploads/1/3/1/4/131406506/f3d06b63cef624.pdf
    • http://dewod.shoplockettlashes.com/uploads/1/3/0/8/130873851/tisikedodatigaj_nerur_naxisuderosasem_xalofu.pdf
    • http://files.doople.co.uk/uploads/1/3/2/6/132681144/sizudewitedofumiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/palasar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/53293883212.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/oxford_phonics_world_1_teacher_s_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8641/files/wotesekarudidoluzadufilug.pdf
    • https://cdn.shopify.com/s/files/1/0432/1837/0728/files/automatismos_electricos_e_industriales_lexus.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/35621237135.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/youtube_to_itunes.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/lenipajadatapov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/30051897608.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8216/files/43861724879.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/58161536554.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/33178022384.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/58420522402.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_off00004b8f.bin
2e8e0531050296c1d048ed55724cc8f91e67e512beed89ea6aa985164ea3d175
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8F 5204 bytes
font_01_sfnt_off00005d60.bin
1bd717e7dd7b8b6b12ce2ea5ea4500264735f9bce62983918f082abae59181d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D60 19116 bytes