Malicious PDF — malware analysis report

Static analysis result for SHA-256 044cc2c4c2e38af7…

MALICIOUS

PDF

41.5 KB Created: 2020-08-22 13:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b1e0497a371a851549bffd99ff7c7f9 SHA-1: f41388aba70acc82e7ffe15b7c9389cb0da94a03 SHA-256: 044cc2c4c2e38af72cec3f7ba0bfcfb35643e40019e8739f40acdee8a19b3117
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports a phishing or malware distribution attempt.

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.cc/pify?keyword=animated+characters+3d+model+free
    • http://files.timberlinebands.com/uploads/1/3/1/4/131483138/db73d5f46.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/xedonezapo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7721/files/carcinoma_basocelular_tipos_histologicos.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/struts_tutorial_for_beginners_with_examples_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/51476614490.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/vawogopox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/wilma_goyne_overton.pdf
    • https://cdn.shopify.com/s/files/1/0432/2639/8888/files/estudio_agrostologico.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/jorovimirabiko.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/circular_economy_mckinsey.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_off00006469.bin
181cee436062c84bbdf48d1c5a3a9459187145a1a596b577252ad452ae7ff6c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6469 5416 bytes
font_01_sfnt_off00007696.bin
3fce2084574235ece0298f3e7b8202eaa9eb846d14044573588501112b9c23f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7696 10260 bytes