Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb8b39cc1511671…

MALICIOUS

PDF

39.5 KB Created: 2020-09-03 11:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0351e8c8ab9fa0f235e00d8cd1f3d92e SHA-1: 69480da5f4ab535ec7c04dfb73ac4ea5b3252db9 SHA-256: 6fb8b39cc151167106ea9cfe517366cb21a357ce27c6757d79e539fffd83c0e7
154 Risk Score

Malware Insights

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

The PDF contains numerous links, masquerading as design resources, that redirect to malicious infrastructure. Specifically, the URL https://ttraff.me/pify?keyword=designs+for+powerpoint+slides is identified as a malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=designs+for+powerpoint+slides
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/7070/9922/files/cancionero_guitarra_acordes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0797/files/71647163850.pdf
    • https://cdn.shopify.com/s/files/1/0440/7328/7830/files/running_plan_for_obese_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0458/0963/1398/files/zuzuxepomolexuvokafibare.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2678/files/wawinurisadulo.pdf
    • https://static.usrfiles.com/ugd/96bf9d_88eed9b98d9444d1ab6ec59692ea86f3.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/65140109448.pdf
    • https://cdn.shopify.com/s/files/1/0431/8242/4215/files/informativos_territoriales_tve_castilla_la_mancha.pdf
    • https://static.usrfiles.com/ugd/4b874d_2b1a21eeae93476ea61879090eba2edb.pdf
    • https://static.usrfiles.com/ugd/5360f8_2dd5d98db7a840ad8e2f43d5b240788e.pdf
    • https://static.usrfiles.com/ugd/b5472a_9cecf7de791447dbbee298d0d9e3ce1f.pdf
    • https://static.usrfiles.com/ugd/aff7ca_98107b31563a4ffc94a8f8905a389474.pdf
    • https://static.usrfiles.com/ugd/c0a468_93249f58eff64ce48c3cad902a97c3f9.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_off00005df2.bin
053c522b8419e5f953d9db90c68d479e891fc45a7dfc24cf7ffedcf704b708b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF2 5092 bytes
font_01_sfnt_off00006f74.bin
390a2249cee97b38b291bb186603647107a0a1911e146c0f619efbfa70a6fa5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F74 10024 bytes