Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb23036bc1c680b…

MALICIOUS

PDF

61.8 KB Created: 2020-08-12 05:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b3cab5af9e936d29f103f5c93832912 SHA-1: 7c2de6f1b11ee42e6c4fac4448a20556d91762da SHA-256: 6fb23036bc1c680b07b687fd4f42fdf5114fb0c2fd70cad1202605c393a4966f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to external PDF files, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=definition+of+customer+centricity+pdf'. The presence of a 'password-protected archive lure' heuristic suggests the document is intended to trick the user into downloading a password-protected file, likely containing a malicious payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=definition+of+customer+centricity+pdf
    • http://files.wisdomandwellness.us/uploads/1/3/0/8/130874678/55d0d327.pdf
    • http://files.4chickstrailbags.com/uploads/1/3/0/7/130776485/4644860.pdf
    • http://files.drcots.com/uploads/1/3/0/7/130739073/sirufijeva.pdf
    • http://files.reedertranslation.com/uploads/1/3/2/6/132682868/rijuzik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/32366694353.pdf
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/41307220577.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/46155380474.pdf
    • https://cdn.shopify.com/s/files/1/0434/3119/8886/files/70945040946.pdf
    • https://cdn.shopify.com/s/files/1/0432/7184/8100/files/19849630833.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/15486468917.pdf
    • https://cdn.shopify.com/s/files/1/0430/2058/3065/files/caterpillar_416_backhoe_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/dipixasazejopev.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5039/files/47688353156.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/6171292183.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0e8.bin
3196447a25cac3eeb2aa0e70d18fe271fa59d1f0bbec6c29a3335891874c4b85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E8 5160 bytes
font_01_sfnt_off0000c272.bin
e9211c8e8b12cec031891624d4a018a390f833b74683c9758cb032abefb42354		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC272 11528 bytes

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