Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5ecdd461ec3e81…

MALICIOUS

PDF

48.9 KB Created: 2020-08-13 22:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 482949462d5ffc9d617f44b41bb8cb4e SHA-1: 80eb5030b292852897cf5d4dea2f0338f020e365 SHA-256: 6d5ecdd461ec3e8145e2654fcc2616688b268da9990fe12d9eefaa2d63f682ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm, with a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains references to a magazine template and the malicious URL. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or phishing.

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/pify?keyword=magazine+template+ai
    • http://files.backbonesports.com/uploads/1/3/1/0/131070579/d3336aa1cca.pdf
    • http://files.mjhscounseling.com/uploads/1/3/2/6/132680955/mugalofige.pdf
    • http://files.authenticfeatures.com/uploads/1/3/1/3/131381946/2924596.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/gizawaliwuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/1853504228.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/zatizifaxitexifoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/vupuwujum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/fuwekoja.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/dapisomegovexenol.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/misuxinemer.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6386/files/behavioral_economics_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6422/files/kaxases.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/dimimuwakedevakewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/laperevikatasivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/statement_of_purpose_for_mba.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/44124400153.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_off000082c4.bin
9b68dbe4f001a31f1ef942523231492fc353f4f03808c5aec16c9c7b4b51697f
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C4 4920 bytes
font_01_sfnt_off00009381.bin
7af0dd030cc5aa629d8dcb115f571bc7c217b3a2fca3782c749fdb313eda46b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9381 10352 bytes