Malicious PDF — malware analysis report

Static analysis result for SHA-256 767eec2b1964c3cc…

MALICIOUS

PDF

41.2 KB Created: 2020-09-09 06:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7edb47e94568b3001cd46b5d7d03e51c SHA-1: 08e9489eaf6c9585d0fcd634e6b5ec313d8d167f SHA-256: 767eec2b1964c3cc2f8fa7df36453b04fe38ed39b2bac196106e926445c12379
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. It also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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.me/pify?keyword=blackpool+dance+festival+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_eb4fea33ec3547b69151513ee97c5c2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1befd1435fb456193bef9b441353e4c.pdf
    • https://static.usrfiles.com/ugd/10b11f_506dfeb65b6440cd9bfbc35781b6b41b.pdf
    • https://static.usrfiles.com/ugd/b8c837_66510327cdb34ea39dd840bf1933f4ff.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_5ddf5f425da54c508f842e44576c4e05.pdf
    • https://static.usrfiles.com/ugd/03a576_740ccaa6522a451d9cd7d2cc42afa8d4.pdf
    • https://static.usrfiles.com/ugd/0b1cf2_f83338ab33324869b52e104dd2a54e8e.pdf
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/kerry_lugar_bill.pdf
    • https://cdn.shopify.com/s/files/1/0428/8747/9455/files/tp_link_av200_wifi_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/online_catalog_design_templates.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/psychological_testing_and_assessment_reviewer.pdf
    • https://cdn.shopify.com/s/files/1/0440/4314/1270/files/stop_automatic_driver_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7722/files/61548796686.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000563f.bin
542f83b102d290527c1591ef4aa75b0835b653024a5a8cb7141c76c0499912cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x563F 3104 bytes
font_01_sfnt_off00006154.bin
543509ce985f8d93cfe61fff279e5bdc5e9c765e82279bf81b1657a0cddf0608
pdf-font-stream PDF embedded font (sfnt) at offset 0x6154 5380 bytes
font_02_sfnt_off000073a4.bin
813cf42df1d5375f0ba575673d4106f779c4749e7659ce9308d53dc3e4b6cad0
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A4 10584 bytes