Malicious PDF — malware analysis report

Static analysis result for SHA-256 67844ddd375a2243…

MALICIOUS

PDF

46.3 KB Created: 2020-08-31 03:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0feb3319d15c13db6a3f1b5962494391 SHA-1: 63ca92812661321f72be1c6463c7a082b80eae37 SHA-256: 67844ddd375a2243800c4e60eed83bc020b7af078c1e5a35cf7563b96df6fe1c
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious domain, likely as part of a phishing or malware distribution scheme. The document body and embedded URLs suggest a lure for free downloads, which is a common tactic for distributing malware. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL reinforces this assessment.

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/wix?keyword=spyro+gyra+discography+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5926b4_d4eea46a7b65434c9cac3689789c9ac5.pdf
    • https://static.usrfiles.com/ugd/067ecb_073cf8c06d814fbda91089ceb263d953.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd2eee70ff68435f8f69e24793e08da0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3776a5ddc8e743ee883cc026ff267536.pdf
    • https://static.usrfiles.com/ugd/41a0b6_f61d7706d36f4619a3bc3215bb2b0e08.pdf
    • https://cdn.shopify.com/s/files/1/0437/6975/7850/files/vanilla_sheet_cake_recipe_allrecipes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0462/0972/8665/files/11315855726.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/caballo_de_troya_3_descargar.pdf
    • https://static.usrfiles.com/ugd/05301a_6b32d5dcf5624486aabb17647c28c97e.pdf
    • https://static.usrfiles.com/ugd/fef806_a0852cc4a12e4f32b71c9a602e9454b6.pdf
    • https://static.usrfiles.com/ugd/c6ac46_845fd078c1244b8f9c6ebcf17c5b91fe.pdf
    • https://static.usrfiles.com/ugd/b65acf_ccd282a14d474d57bd466c96124f462e.pdf
    • https://static.usrfiles.com/ugd/599f1c_b4b9c71408d84f779b6a299da5c7bc5b.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_off00006628.bin
ec6b5d5332b825eda161185e34daa10a84fca53a269cfae29125d5abacd2a4f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6628 5716 bytes
font_01_sfnt_off000079b0.bin
f90b2254eb125fbc92592494df4862832f365c12765595c42b7ada5deeea7a1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B0 16168 bytes