Malicious PDF — malware analysis report

Static analysis result for SHA-256 478e8562d75fefba…

MALICIOUS

PDF

43.9 KB Created: 2020-08-11 20:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d6890838a1e52dfb55b07c77e3fe1fe SHA-1: 099e7e12bcb0f246a8723bf5fed945e608a47d19 SHA-256: 478e8562d75fefbaefa060924d8185ecc88576f5ae10b55f1a2f2b48c951b7de
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=bcece+medical+certificate+format+pdf', which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to 'medical certificate format pdf', suggesting a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

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=bcece+medical+certificate+format+pdf
    • http://files.cwc24.com/uploads/1/3/1/6/131606951/tufewijo-gozumodalujowut-polovav.pdf
    • http://xuzupovok.longxarts.com/uploads/1/3/2/8/132815002/c30b81ac91.pdf
    • http://gebalam.bresslercc.com/uploads/1/3/1/6/131607095/cef5b137bf.pdf
    • https://cdn.shopify.com/s/files/1/0434/8366/0441/files/lugutexufodubaxus.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/manual_aashto_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/8152297183.pdf
    • https://cdn.shopify.com/s/files/1/0454/7867/4584/files/richard_bandler_the_ultimate_introduction_to_nlp.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/zidita.pdf
    • https://cdn.shopify.com/s/files/1/0435/0659/8040/files/dipololipamofijabodoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/1060/4705/files/10809619426.pdf
    • https://cdn.shopify.com/s/files/1/0438/3146/0002/files/delogeximobetarazuresoki.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/meningitis_bacteriana_en_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0446/8791/7209/files/alternative_dispute_resolution_reviewer.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/48038876302.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/94219662150.pdf
    • https://cdn.shopify.com/s/files/1/0436/5480/7717/files/us_largest_cities.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_off00006c66.bin
d4bc2c1331b49731544cfac86d228a98658f80d5371eb186f32143757851c32d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C66 5172 bytes
font_01_sfnt_off00007ddf.bin
a343cafdfab50c0ba76dc51f45406d1063d312cf7f19e74a4a2ed9a2a15f28ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDF 10904 bytes