Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fab01769c28b6e…

MALICIOUS

PDF

49.6 KB Created: 2020-07-21 07:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e38193f1888620aa78f7ad93a8fbb25 SHA-1: 62b409c0c7bd353ea31e61bd52c4aa59a5ce2764 SHA-256: 01fab01769c28b6e4d1eb1784526e011782317595818bc186ef8932fc0e040d0
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document's metadata and structure suggest it was generated by wkhtmltopdf, and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the embedded URL. The presence of a password-protected archive lure heuristic suggests the document is intended to facilitate the delivery of a malicious payload.

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.cc/wb?keyword=philosophy%20of%20inclusive%20education%20pdf
    • http://files.mygentlehealth.com/uploads/1/3/0/9/130969871/2898801.pdf
    • http://files.pawsitiveperspective.net/uploads/1/3/0/9/130969986/livunefo.pdf
    • http://files.intempodanceensemble.org/uploads/1/3/1/8/131871874/wedodav-tipuzajuvetidiw-luwotapupivegus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/mikajidamiretelasuxenazuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32600433864.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/wuwuvodoluzovalojiwikob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/motusivotomilelewowobovel.pdf
    • https://likoruki.files.wordpress.com/2020/06/tebowigup.pdf
    • https://naxuxeva.files.wordpress.com/2020/07/jisifife.pdf
    • https://zubijunemovo.files.wordpress.com/2020/07/jagekutakenanetevorab.pdf
    • https://vavomavazi.files.wordpress.com/2020/07/gunabobajamudugogaropiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/wulikoxugexavametem.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/8273776135.pdf
    • https://cdn.shopify.com/s/files/1/0429/3866/3079/files/31827406842.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/92334849220.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/39147552539.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/kemilojepujuwemiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/wimilipumi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/52909134949.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/40529643810.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_off000084fc.bin
f2049ef1de0e492dd34f8eb21a0d55d8cd1240f7741b9c597d2a9e6abf64aa86
pdf-font-stream PDF embedded font (sfnt) at offset 0x84FC 5192 bytes
font_01_sfnt_off000096a3.bin
3dc4b61ef72bd7d46d3d474951a7817500cbe1439a32bef2ad428bbd8472ffa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x96A3 10100 bytes