Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e43585f8701664…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 03:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e915b466bfb5b036a1ba2201893f8cf SHA-1: 0f4de6c9ed22df21dcce3f2b2b70f7ef918bba17 SHA-256: 54e43585f87016644ad7693dcdd8928726ef720f494a10edc1dc03ffc1a636b8
152 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 pointing to Shopify domains, which is indicative of a link farm or SEO poisoning technique. One of these links, https://ttraff.com/wix?keyword=debenhams+%25C4%258D%25C3%25ADtanie+Otv%25C3%25A1racia+doba, is flagged as a malicious redirector. The document body, though heavily garbled, contains text related to 'Debenhams' and 'opening hours', suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=debenhams+%25C4%258D%25C3%25ADtanie+Otv%25C3%25A1racia+doba
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/sibezuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3317/3927/files/capacity_factor_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/tibibelidogatabirow.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/ponezifujelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/91795257062.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/77637358988.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/gabevijatevakorasu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/52330621497.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/aadhaar_card_portal_app.pdf
    • https://cdn.shopify.com/s/files/1/0447/9365/9543/files/pocket_ukulele_tuner_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2516/2652/files/sakatanaxobe.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/adobe_reader_latest_version_download_for_pc.pdf
    • https://static.usrfiles.com/ugd/73cb9e_ea6a0dfb2aa746f681055f85b7e444e0.pdf
    • https://static.usrfiles.com/ugd/906e9f_4df4708bfd904a3fb6375453be281989.pdf
    • https://static.usrfiles.com/ugd/0df15e_550231cbb5734dbe81a749d2a3fc5bf6.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_off000065d8.bin
9de30fa4ea4cbf57ba060535e820df36695d5116e7e8aa6d056e57bbf9f29a5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D8 5900 bytes
font_01_sfnt_off000078e1.bin
43473c9763c8fecfea81d9730825a40bc8b3da5e9630318ad4ddb16cb1504f94
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E1 13396 bytes