Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e4f2ae9efe6f6d…

MALICIOUS

PDF

43.6 KB Created: 2020-09-09 23:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0126c9bbada7093e5866c6a9a4edab8b SHA-1: c87508033b9a5d27c4743b8383871a01dec6bf4b SHA-256: 71e4f2ae9efe6f6d9c6fbe746958896953c7fd8456b4e9e0fa7c7aeb7fe290c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link that redirects to known malicious infrastructure, disguised as an Emirates visa application form. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=emirates%20visa%20application%20form%20pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b0cb2d_41a134d334c747d2acb6a1fa605edb93.pdf
    • https://static.usrfiles.com/ugd/7c3584_fd1c423d634f4f0fb8c068ab88c26c3f.pdf
    • https://static.usrfiles.com/ugd/6f58fb_8a1035f889674099b0cdfeaa68ad424d.pdf
    • https://static.usrfiles.com/ugd/4479ed_a328b2855adb4223add2ef15fc6fe157.pdf
    • https://static.usrfiles.com/ugd/6da380_bbea2c56c7f4428d9ccea3a17f8c54f6.pdf
    • https://static.usrfiles.com/ugd/067ecb_7c3f83d1bdd64274b80dc7098a8fc0fa.pdf
    • https://static.usrfiles.com/ugd/d775a9_487aa79aab9d43839ae72659111b60d8.pdf
    • https://static.usrfiles.com/ugd/90c678_823ca04fa09948b7a6e9a8627f9fe0f9.pdf
    • https://static.usrfiles.com/ugd/2a2e94_a2c64412288a4d67bb351ae3a29e3ec9.pdf
    • https://static.usrfiles.com/ugd/b8c837_79eba934a7234347be9d08136de9d753.pdf
    • https://cdn.shopify.com/s/files/1/0440/9910/9016/files/du_2019_application_form_ug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/e_magazine_legal.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/61133479611.pdf
    • https://cdn.shopify.com/s/files/1/0433/4397/0463/files/rogemaxijojobuxirefisajuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6657/files/ho_chi_minh_city_guide.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_off00006b64.bin
2c4cf36968ec9d8da8dbfe1d7957f12a3c6fc09c87d49231548cf4c5c0541493
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B64 5320 bytes
font_01_sfnt_off00007d6b.bin
93d7b8152976de31e794a63e3d2117ac1fd0e75136ad427d41a2b8bad7590a36
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6B 10632 bytes