Malicious PDF — malware analysis report

Static analysis result for SHA-256 c470c22b5a355400…

MALICIOUS

PDF

52.1 KB Created: 2020-08-04 17:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd2f35ec920e1130cfe483de94fc5889 SHA-1: d0fdcbc7453f8dd1fb1574d62183cf1c03a566e0 SHA-256: c470c22b5a355400e3a14cfc59e942df8c2a646d901556ba47d2ca7d2133c5f8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cursive+alphabet+pdf, which is likely used to redirect users to further malicious content. The document body itself is heavily obfuscated and appears to contain embedded URLs.

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.ru/pify?keyword=cursive+alphabet+pdf
    • http://files.missycampmusic.com/uploads/1/3/1/0/131070851/wibozow-tozatuli-dibisujovus.pdf
    • http://files.evespiritualhealer.com/uploads/1/3/0/7/130739715/gamidomu-dekizugasov-bibebepeze-xejenoweser.pdf
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdf
    • http://files.mermaidinforeignwaters.com/uploads/1/3/2/3/132302871/2031a79c1.pdf
    • https://cdn.shopify.com/s/files/1/0435/8507/7405/files/molepemezukusos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/mitawolegejeza.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/masilojedudulomexezuje.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/35451484734.pdf
    • https://cdn.shopify.com/s/files/1/0439/7803/1262/files/85779292792.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/3066847506.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/jenis_blanching.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/kemanisusovesogojovaki.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/sobegarebo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/zobatuzizegebuvonisowimu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8649/6415/files/15613729057.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70339383958.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ee6.bin
ce6636738b1f59ad8514d3162e12e336b207a4018061f3dd687062b227b69df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE6 5232 bytes
font_01_sfnt_off0000a0a4.bin
472e9dae596bcfafd01e61ef9ee1c92f56fa1c3dd3d819300a7bccf9d7dcb98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A4 10456 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.