Malicious PDF — malware analysis report

Static analysis result for SHA-256 123e87a513389664…

MALICIOUS

PDF

40.0 KB Created: 2020-08-17 04:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e59534fbed7812f9e80c6a2555daab3 SHA-1: 7c0c544109e66f5b7f71ee2709b7d38806f06d9e SHA-256: 123e87a51338966469dc7b0f015f785a1260ac853fbb2d0fa94023046ccdc60e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=portugu%25C3%25AAs+para+todos+pdf', is identified as a known malicious redirector. This suggests the document is designed to lead users to potentially harmful content or to engage in SEO link farming for malicious purposes. No scripts were extracted, but the presence of embedded URLs and the malicious redirector indicate a phishing or redirection attack.

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=portugu%25C3%25AAs+para+todos+pdf
    • http://files.greenphilsinc.com/uploads/1/3/1/0/131069906/da3c2.pdf
    • http://files.runningrabbitfarm.com/uploads/1/3/2/8/132816202/ralomuxafojakigixef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8994/2945/files/ncert_biology_class_12_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/livukugezegexekotupune.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdf
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/orthographic_projection_basics.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/nekomejopize.pdf
    • https://cdn.shopify.com/s/files/1/0437/3512/2081/files/arabic_dictionary_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/75716538434.pdf
    • https://cdn.shopify.com/s/files/1/0435/0941/6095/files/rc_model_airplane_design.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/vuwekimexom.pdf
    • https://cdn.shopify.com/s/files/1/0434/4781/2248/files/96505143838.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/khasiat_bayam_merah.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_off00005a19.bin
10d7fe7883dfafb641236a33067e6141dd4ef1659a659d0c8095ae2724c5f519
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A19 5328 bytes
font_01_sfnt_off00006c0a.bin
852d4bc6bc7796120730bdea394a17798265a855e87557807db09445100a4f1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 12392 bytes