Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bce32dbee603ee…

MALICIOUS

PDF

37.3 KB Created: 2020-08-30 03:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efa13a4d9b12965a9ef1e264fcbf8448 SHA-1: 3b17814826b2bac1b22fd564d2b878d442b5639d SHA-256: 67bce32dbee603eed9c07aa2649118e3d38463fe49535dce67ac0e01f7cbad54
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading films. The presence of numerous external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted from this sample.

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/wix?keyword=mega.nz+film+indirme
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b7306e_3f39bbd93440498cac7d49e0e8bd7c0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a322527bd40c4432be99b75aae917238.pdf
    • https://static.usrfiles.com/ugd/b8c837_54d4cf8d3a224de9b0cee851fed2f3e0.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/complication_of_pregnancy_induced_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/69172137193.pdf
    • https://cdn.shopify.com/s/files/1/0437/6218/8449/files/attestation_de_travail_cdi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/bawakexe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4139/7656/files/pesamoxukalesinifas.pdf
    • https://cdn.shopify.com/s/files/1/0438/5108/8032/files/business_process_modelling_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/zimesibaposofaniwijeri.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/funopemeva.pdf
    • https://cdn.shopify.com/s/files/1/0437/0209/1929/files/alexander_rybak_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/kipukajarodajebur.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_off00005350.bin
030d65567423fe7efeee7e1138a1af81146db93ea7be18564b324ede5b0aee90
pdf-font-stream PDF embedded font (sfnt) at offset 0x5350 5136 bytes
font_01_sfnt_off000064cb.bin
1d35bfe8e35266e34239aae907f4257ba86eb20bf40be603f9f7a2722abd3a27
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 10472 bytes