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)
MD5: 143ce46622411191403f7d5154a60bb8 SHA-1: c388c512045a7acdf7862a59eba62def14205d8c SHA-256: 106ded8321a2f5d2baa8494678d4da2d662080e4e86a43bc3dab21c5431fa322
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded URLs, many of which point to other PDF files. One URL, 'https://ttraff.cc/pify?keyword=the+browser+hacker%2527s+handbook+pdf', is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests the document is used to manipulate search engine results or to distribute further malicious content, potentially as part of a phishing campaign.

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/pify?keyword=the+browser+hacker%2527s+handbook+pdf
    • http://files.billanderton.uk/uploads/1/3/2/6/132680994/kigevisolixoba_lupuwadeson.pdf
    • http://files.freemeditationnz.com/uploads/1/3/1/6/131606073/2917448.pdf
    • http://files.victoriagyors.com/uploads/1/3/2/7/132710687/mobulif.pdf
    • http://files.madebyloulou.net/uploads/1/3/1/8/131871891/59bfb6ba928ffb6.pdf
    • http://files.beyondbatmitzvah.com/uploads/1/3/0/7/130776875/a1813.pdf
    • http://files.peoplestories.net/uploads/1/3/1/3/131382320/096e95966deaf01.pdf
    • http://files.michellescreations.shop/uploads/1/3/2/6/132682883/bf45856104.pdf
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdf
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdf
    • http://files.apcdg.com/uploads/1/3/0/9/130969993/56f2781eb5b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wumegubutil.files.wordpress.com/2020/06/43815391829.pdf
    • https://ritorot.files.wordpress.com/2020/07/zemiporalojaxaranebatu.pdf
    • https://gixerusowave.files.wordpress.com/2020/06/51922719800.pdf
    • https://bozumar.files.wordpress.com/2020/06/23589582445.pdf
    • https://wujujilofa.files.wordpress.com/2020/06/79639812570.pdf
    • https://fupukofove.files.wordpress.com/2020/07/wiwewakijotumoxafule.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83759083977.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/395667921.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_off00005aeb.bin
c2f10b6d830ff24b806dae4e78a40d1778726e0470c5342e8875c769fd63080d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEB 5152 bytes
font_01_sfnt_off00006c6d.bin
f2e057c8d767bd3acbe10f9c2e0b6c42fc9ce9ab127bd47ea89216104e2c0598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6D 12896 bytes

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