Malicious PDF — malware analysis report

Static analysis result for SHA-256 d649a01678335352…

MALICIOUS

PDF

41.9 KB Created: 2020-08-17 16:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8a6f7448d187db04df6026c49e29b60 SHA-1: da87b52cc77e66a87fd7474f08372f1ed2b30ac0 SHA-256: d649a01678335352835d58c8ae88c518d2ac39df3648408229fb31db32b875e6
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Chinese visa application form for UK citizens'. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a compromised or malicious site, likely for credential harvesting or malware delivery.

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.ru/pify?keyword=chinese+visa+application+form+for+uk+citizens
    • http://ranebul.innerlight-center.com/uploads/1/3/1/4/131438464/bawapumozavenil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/60819141994.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/48874405860.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/34757073692.pdf
    • https://cdn.shopify.com/s/files/1/0434/4076/7132/files/filmic_pro_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/vutunuxogamixaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/massey_ferguson_135_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/buderus_gb132_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5216/files/50740760092.pdf
    • https://cdn.shopify.com/s/files/1/0436/2171/2034/files/dellorto_dhla_tuning_manual.pdf
    • https://cdn.shopify.com/s/files/1/0446/9224/2588/files/72687843247.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20011772627.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/97153158556.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_off000065db.bin
fa4a0e573ec036e0269bbb4d1202f990c1b62954679c82db2bacbc43490ee734
pdf-font-stream PDF embedded font (sfnt) at offset 0x65DB 5332 bytes
font_01_sfnt_off000077da.bin
f6b517c76d7abaed0ad2fc151311a65c5824f5365efb235d78b1fbf3e1c5dae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x77DA 10196 bytes