Malicious PDF — malware analysis report

Static analysis result for SHA-256 106ded8321a2f5d2…

MALICIOUS

PDF

40.1 KB Created: 2020-07-09 11:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 143ce46622411191403f7d5154a60bb8 SHA-1: c388c512045a7acdf7862a59eba62def14205d8c SHA-256: 106ded8321a2f5d2baa8494678d4da2d662080e4e86a43bc3dab21c5431fa322
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to external PDF files hosted on various domains. One URL, 'https://ttraff.cc/pify?keyword=the+browser+hacker%2527s+handbook+pdf', is identified as a known malicious redirector. The document's structure and the nature of the links suggest it is part of a link farm, likely intended for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via redirection.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=the+browser+hacker%2527s+handbook+pdf In PDF document text
    • http://files.billanderton.uk/uploads/1/3/2/6/132680994/kigevisolixoba_lupuwadeson.pdfIn PDF document text
    • http://files.freemeditationnz.com/uploads/1/3/1/6/131606073/2917448.pdfIn PDF document text
    • http://files.victoriagyors.com/uploads/1/3/2/7/132710687/mobulif.pdfIn PDF document text
    • http://files.madebyloulou.net/uploads/1/3/1/8/131871891/59bfb6ba928ffb6.pdfIn PDF document text
    • http://files.beyondbatmitzvah.com/uploads/1/3/0/7/130776875/a1813.pdfIn PDF document text
    • http://files.peoplestories.net/uploads/1/3/1/3/131382320/096e95966deaf01.pdfIn PDF document text
    • http://files.michellescreations.shop/uploads/1/3/2/6/132682883/bf45856104.pdfIn PDF document text
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdfIn PDF document text
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdfIn PDF document text
    • http://files.apcdg.com/uploads/1/3/0/9/130969993/56f2781eb5b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wumegubutil.files.wordpress.com/2020/06/43815391829.pdfIn PDF document text
    • https://ritorot.files.wordpress.com/2020/07/zemiporalojaxaranebatu.pdfIn PDF document text
    • https://gixerusowave.files.wordpress.com/2020/06/51922719800.pdfIn PDF document text
    • https://bozumar.files.wordpress.com/2020/06/23589582445.pdfIn PDF document text
    • https://wujujilofa.files.wordpress.com/2020/06/79639812570.pdfIn PDF document text
    • https://fupukofove.files.wordpress.com/2020/07/wiwewakijotumoxafule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83759083977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/395667921.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_off00005aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEB 5152 bytes
SHA-256: c2f10b6d830ff24b806dae4e78a40d1778726e0470c5342e8875c769fd63080d
font_01_sfnt_off00006c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6D 12896 bytes
SHA-256: f2e057c8d767bd3acbe10f9c2e0b6c42fc9ce9ab127bd47ea89216104e2c0598