Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c26093484a81a4…

MALICIOUS

PDF

42.5 KB Created: 2020-08-20 08:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d867a9c741d0d9900eeee7a977fd3272 SHA-1: eb882164bf2a39d05ee278706b66ed8ecd76f2ec SHA-256: 00c26093484a81a4af68c56273f6d46614ce6d728dd633dc05eb394e7d1a04be
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure for a "Boom beach hack apk" which redirects to a malicious URL. It also features a large number of embedded links to other PDF files hosted on Shopify, suggesting a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=boom+beach+hack+apk+v30.+104+apkhouse
    • http://navew.taiwanhotelnews.com/uploads/1/3/0/8/130813714/pumenixuwifo.pdf
    • http://files.david-jennings.net/uploads/1/3/1/4/131454355/lidototatumev.pdf
    • http://pexud.sabrinamarasigan.com/uploads/1/3/1/3/131379021/rexadevijeveg.pdf
    • http://files.leesburggourmet.com/uploads/1/3/1/6/131607062/gowovefa.pdf
    • http://wolug.tiffanybryson.com/uploads/1/3/1/3/131381679/vamatijesimowafoteza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.pdf
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/proverbs_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/92300033526.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1892/files/75891718190.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/fetawovukovas.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/data_analysis_with_open_source_tools_janert.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/48550744221.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/zekesezizadigilijo.pdf
    • https://cdn.shopify.com/s/files/1/0459/5289/3087/files/rokixitiluzegepowo.pdf
    • https://cdn.shopify.com/s/files/1/0463/0570/6146/files/19876939269.pdf
    • https://cdn.shopify.com/s/files/1/0431/9635/0624/files/clinical_biochemistry_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/84329873407.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/jagabaj.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_off00006620.bin
f1fecaa70aa4ee34a0bf85b85a47fb3ecdf88b46ce0ea987dcf17cfec2ad18e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6620 5836 bytes
font_01_sfnt_off000079f2.bin
4cd3af4258f8dd26c6095c03bdf5dadfac96f4c3846d830096f7d348a0ba5e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F2 10136 bytes

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