Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab7dafe1fbab129…

MALICIOUS

PDF

197.6 KB Created: 2020-07-10 19:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 16fa17e1502daecef1728ea180867cc9 SHA-1: d420b74f7327e0858d7a2c290e85509d21d82091 SHA-256: 6ab7dafe1fbab1292c6bcffb0e86bcdd1b7800b9867d50e699031c67fcaced25
134 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for SEO-based phishing. The primary lure appears to be a fake document download, as indicated by the URL structure and the document body content. While no scripts were explicitly extracted, the PDF structure and the presence of redirector links suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=resumen%20derecho%20romano%20arguello%20pdf In PDF document text
    • http://files.bbluntsheabutter.shop/uploads/1/3/1/3/131383018/bajof.pdfIn PDF document text
    • http://files.mrsjankowski.com/uploads/1/3/1/3/131382607/fufamujowupi_virizesidawuse_vozitofopikanep_gizijomid.pdfIn PDF document text
    • http://files.jacksoncieslak.com/uploads/1/3/0/8/130874029/bagupexor-xexonekafeba-babirodibi.pdfIn PDF document text
    • http://files.tonypalermolifecoach.com/uploads/1/3/1/4/131437740/eaf0f757.pdfIn PDF document text
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/wawezanuz-titun-resuta-ponupax.pdfIn PDF document text
    • http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdfIn PDF document text
    • http://files.saintalphonsusschool.org/uploads/1/3/1/8/131857071/b41fba5.pdfIn PDF document text
    • http://files.circusla.com/uploads/1/3/1/6/131607005/1517955.pdfIn PDF document text
    • http://files.brattleboropolice.org/uploads/1/3/1/3/131384468/6110a75cd9394.pdfIn PDF document text
    • http://files.silviaramalli.com/uploads/1/3/0/8/130874495/2a0be76a00cc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://defamufomowa.files.wordpress.com/2020/06/20103054714.pdfIn PDF document text
    • https://bimirofi.files.wordpress.com/2020/06/baporexujatek.pdfIn PDF document text
    • https://zozijonatoto.files.wordpress.com/2020/06/74058315629.pdfIn PDF document text
    • https://weteritisomu.files.wordpress.com/2020/06/femusebetukixazifub.pdfIn PDF document text
    • https://rezewer.files.wordpress.com/2020/07/99010532498.pdfIn PDF document text
    • https://bikaluvamu.files.wordpress.com/2020/07/89173247480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zinigezumapafukutogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/3477655008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/xusaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76222514852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/26329011456.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002d380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D380 5332 bytes
SHA-256: b647114a4acc7266084c6b11c6c230ed25e8bc7764e3e2d79caf2fcd3b8f09f2
font_01_sfnt_off0002e56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E56B 10340 bytes
SHA-256: 38820aa1ef90c0c3679900fa84cb9861e1f13d8ca4d918f5a34b54ab0bb5becc