Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b0afb1204fafbe…

MALICIOUS

PDF

43.6 KB Created: 2020-09-06 13:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07611b0ec7fc89ec7a28f32712ed07d0 SHA-1: 9a04dfa6e1384ea44e70eb8e6b0764603b2f8d79 SHA-256: 11b0afb1204fafbed3a623de6852954d107a55c65d146b02ea2767c72be8d759
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search results or distribute malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious redirection or phishing 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.club/wix?keyword=self+guided+tours+of+washington+dc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0a3240_a813a221c5874cfabd737ee3fae4ee9e.pdf
    • https://static.usrfiles.com/ugd/e33828_062e717271b249f9826a1e376b8f8f28.pdf
    • https://static.usrfiles.com/ugd/0c4177_141c4378050c4b229d9e89e144c792f9.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_3f07ef11d20f497d9c29c0118af6c532.pdf
    • https://static.usrfiles.com/ugd/966478_f8fe8edc8f49466294cec4392f02d54a.pdf
    • https://cdn.shopify.com/s/files/1/0435/6364/7131/files/remexogarilivuzawoz.pdf
    • https://cdn.shopify.com/s/files/1/0449/5484/5352/files/informational_interview_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/milinebenetejenonu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/mukosenupuvonidumagitonip.pdf
    • https://cdn.shopify.com/s/files/1/0436/1289/7437/files/70198534954.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/23528323804.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/mp_cabinet_ministers_list_2020_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/wuziwugikutiworidoxij.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_off00006a2f.bin
4412480d38c3b439a8711d8504ee4a1ec69ea634bbb7ebc164aae16553e8fd45
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2F 5480 bytes
font_01_sfnt_off00007ce0.bin
f7905316818a72e0e1dc7bc9a49ad283124ac8fb3a680cc8266f2c223609c409
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE0 10736 bytes