Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d738fc804f79aee…

MALICIOUS

PDF

49.7 KB Created: 2020-08-16 02:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cffd5654741cf693c081bc3dccf5968b SHA-1: e4057e67817396aa7c8d12fd28a6c94cce71ac87 SHA-256: 5d738fc804f79aee97caf83b7540656df3999cbf17d8ceefc5ab0bb93d43916c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/wb?keyword=tintin%20affaire%20tournesol%20pdf. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

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=tintin%20affaire%20tournesol%20pdf
    • http://files.touatvue.com/uploads/1/3/1/4/131406663/mujili.pdf
    • http://gorep.shawnhopkinsauthor.com/uploads/1/3/0/9/130969332/d5adde.pdf
    • http://files.thibeaulinguistics.com/uploads/1/3/0/7/130776063/jopexazedir.pdf
    • http://wived.cliburnenergy.com/uploads/1/3/1/4/131454106/2971223.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/77742753428.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/femuzesekobirunutor.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/berobop.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2115/files/gogibajeraxozidepo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/ketovepukosozagagowexuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/sapotopikurudupanedejob.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/shon_harris_cissp_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/architect_s_data_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/saletamabexulaloka.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/26668250518.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/tifiwawafisisebazawos.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_off0000869e.bin
9c2f47243c48be91d0a2f4c6c76487e72ec24376b9269f618e85498465635d43
pdf-font-stream PDF embedded font (sfnt) at offset 0x869E 4984 bytes
font_01_sfnt_off00009795.bin
4cc57148d65f239234dea0407ad04fa2513bf35f6704473d39536c0d279cb60e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9795 10036 bytes