Malicious PDF — malware analysis report

Static analysis result for SHA-256 6713e0e2c9f5bd11…

MALICIOUS

PDF

52.0 KB Created: 2020-07-30 10:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87624b8693435be196f88fccd75d5dad SHA-1: e365719483c39b422324fdeaf90521e8d40e1b7b SHA-256: 6713e0e2c9f5bd11cba8938f1ae5da591768648cebebc1af2202f224414c00b7
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a known malicious redirector. The primary malicious link, https://ttraff.com/pify?keyword=international+classification+of+headache+disorders+pdf, is designed to redirect users to further malicious infrastructure. The document's structure and content suggest it is part of a link farm or SEO manipulation scheme to distribute malware or phishing content.

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.com/pify?keyword=international+classification+of+headache+disorders+pdf
    • http://files.ucsblotp.org/uploads/1/3/0/7/130739490/maxupudataw-wojuk-lenuwuzevi.pdf
    • http://files.uvcheer.com/uploads/1/3/0/7/130776877/xaselufavexibujawopo.pdf
    • http://files.budsdoobieclips.com/uploads/1/3/0/7/130740624/lanixa-wokodenoxip-fepilowexef-zexivomo.pdf
    • http://files.sbtravelbureau.com/uploads/1/3/1/8/131872273/c37658.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/vumokosubugor.pdf
    • https://cdn.shopify.com/s/files/1/0438/1779/5741/files/matukemo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/44921715609.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/26342430096.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/gegekivetamabuzixobod.pdf
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/99328407654.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/77269712068.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8424/files/wuzabuwivebukador.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/95926017630.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/56006586337.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/56002415729.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_off00008e6b.bin
664304bd15c2292d5b7698b4e7047dcfc3deb31243e56f240cef760fc15dc5b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6B 4968 bytes
font_01_sfnt_off00009f36.bin
10414b7a2cefb6d966ff877b4c2eef31ffbba37912b34d7f5735923e7775282a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F36 10424 bytes