Malicious PDF — malware analysis report

Static analysis result for SHA-256 71bc9e91b155e878…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 03:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d7a7fc8f5efcbc1137e9b24fb771a3 SHA-1: f64d3d424411c8878d90fd065339d78fac412bad SHA-256: 71bc9e91b155e878d5768ba368fcbd5cd2f0e53653890da42bd5a87fa3c38b02
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.com/wix?keyword=gigabyte+ga+h61m+ds2', is flagged as a known malicious redirector. While no scripts were directly extracted, the nature of the embedded links suggests an attempt to redirect users to potentially harmful content, aligning with common phishing or malicious redirection tactics.

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.com/wix?keyword=gigabyte+ga+h61m+ds2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/73f3b0_da0f132683134e9aa943adb773a2e452.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5e2d96e8b664eca90f671195c5a7cb4.pdf
    • https://static.usrfiles.com/ugd/fbccce_55c3fb9ad82c47ddbbe64b2a8b1f8e6e.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0489/files/mefurofibavidukez.pdf
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/conquest_of_paradise_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6703/files/45591870873.pdf
    • https://cdn.shopify.com/s/files/1/0435/5555/3432/files/viwis.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5224/files/ielts_speaking_all_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/5349/8019/files/analytical_reasoning_nts.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/43757032711.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/tupoboxujep.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/fekevex.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_off00005bfd.bin
919e8e23a11db783754272cccbae26f4323b403116b366c00cbd23b71ec8194e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFD 5292 bytes
font_01_sfnt_off00006e12.bin
14320d0c0cea113f4679764df71171df984b515e60c35deb936b4e68974a48b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E12 10828 bytes
font_02_sfnt_off000092f5.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x92F5 4324 bytes