Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d4bfe1ec279ff6…

MALICIOUS

PDF

35.7 KB Created: 2020-08-09 09:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d495192fbe8c3e682ab6a98c9e367def SHA-1: eb81a643b1113bc38cd06300505c60a526d74b3e SHA-256: 03d4bfe1ec279ff6ca467324db8d1cc30d241fa288136ad8b7529e894eefc305
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URLs and the document body suggest a lure for downloading files, likely to distribute malware. While no scripts were explicitly extracted, the PDF structure and the presence of numerous links point towards a malicious redirection attempt.

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=peter+atkins+principios+de+quimica+pdf+download
    • http://zekuzogul.shanesimaginenation.org/uploads/1/3/1/4/131408738/3e9fb5f9aaa615c.pdf
    • http://files.salahghazzal.com/uploads/1/3/2/3/132303269/jusoru.pdf
    • http://files.luxesalonmaui.com/uploads/1/3/2/8/132814990/gixurefeku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/jiworevuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/zovopinomenutusidibixo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/88077430663.pdf
    • https://cdn.shopify.com/s/files/1/0438/5118/6336/files/compliance_risk_management_framework.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/faliligotafiforevefaxigog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/89986339407.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/tuwebenibavaraz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/42745006773.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/sewepewulogiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/57880374144.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/zilenapixunidakiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.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_off00004c76.bin
e7f8d6a54a67b5db1ed44dbe198cfa5350e15e23f4cfac9e4a633d239eedf8d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C76 5584 bytes
font_01_sfnt_off00005f76.bin
22d3b67997b73523c5a3d672e02612c635b9e290b2c5dee0a6cc5c742cb6e2bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F76 10008 bytes