Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1833a657cfe925…

MALICIOUS

PDF

59.7 KB Created: 2020-08-07 05:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2330f6d05fb2aa341297d343c0ff23f6 SHA-1: 59278226e596c73e3666bb21844b12b50d17f8a2 SHA-256: 0e1833a657cfe92561ee55981986b8470a29998be1dd1ae5587faaefcb7387b2
154 Risk Score

Malware Insights

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

The PDF document contains a malicious link that redirects to a site offering 'download aplikasi convert pdf to word full crack'. This is a common lure for distributing malware. The PDF itself is structured as a link farm, with many embedded URLs pointing to various PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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/wb?keyword=download%20aplikasi%20convert%20pdf%20to%20word%20full%20crack
    • http://files.romainewashington.com/uploads/1/3/1/8/131857193/ropodefi.pdf
    • http://files.mjrlashes.com/uploads/1/3/0/8/130813913/4898753.pdf
    • http://files.connextionsmagazine.com/uploads/1/3/1/4/131453247/11cfc2641.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/51489435462.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/98999871210.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/boolean_algebra_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/79802768353.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10217245918.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4295/files/rozanewadojor.pdf
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/small_splitter.pdf
    • https://cdn.shopify.com/s/files/1/0437/5353/7685/files/anatomie_du_systme_respiratoire.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/kamonawefole.pdf
    • https://cdn.shopify.com/s/files/1/0429/2883/2675/files/xaxegujuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1317992411.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1520/files/tatifikuti.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_off0000a99b.bin
e23922300374ba1aeb41c4fe4873d5d1b3b6aa1341a81bffcf3dbf23e6c431a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA99B 5364 bytes
font_01_sfnt_off0000bc0d.bin
5fbbd51a8a04c5c6da7a5a0c32762e65a1dbf6d3e106d5b3432bbdb98bcd7882
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0D 10992 bytes