Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da2ac99153594cb…

MALICIOUS

PDF

37.4 KB Created: 2020-08-05 17:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1b350ba976916ab00a802278f2da997 SHA-1: 87f44b5ee300505670c93fbd6b196bbd6f7fc1f8 SHA-256: 0da2ac99153594cb26fe4f37ceffe9db15a09e9b3f44d795849dd33bcf25b289
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to drive traffic to a malicious site. The ML classifier strongly flagged this PDF as malicious. The embedded link in the document body, 'https://ttraff.com/wb?keyword=uk%20road%20signs%20book%20pdf', is a primary indicator of this malicious redirection attempt.

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/wb?keyword=uk%20road%20signs%20book%20pdf
    • http://files.wingwoodfarm.com/uploads/1/3/0/7/130738836/fe82b.pdf
    • http://files.madridistasatl.com/uploads/1/3/0/7/130740480/tarutajaluna-vapogaxo.pdf
    • http://files.millerwebdesignservices.evansconstructionconsultingllc.com/uploads/1/3/0/8/130874599/mezufafavagufo-jenasisezibil.pdf
    • http://files.manestreethaircompany.com/uploads/1/3/0/7/130739991/renat.pdf
    • http://files.ardasphotography.com/uploads/1/3/1/4/131483153/zelotilibivunotapot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/85680106685.pdf
    • https://cdn.shopify.com/s/files/1/0435/0712/2342/files/dubuje.pdf
    • https://cdn.shopify.com/s/files/1/0428/1614/3526/files/atmega16_datasheet_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/83656776571.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/pierre_bourdieu_outline_of_a_theory_of_practice.pdf
    • https://cdn.shopify.com/s/files/1/0430/1189/9545/files/jalefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/52151627033.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/78891217339.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/taxivukewutisipotujudim.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_off00004b15.bin
e4816008f0acc2cfc2969882a9e80757366bead1ec394ef8ef5c2153071d83dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B15 5372 bytes
font_01_sfnt_off00005d6a.bin
4632b54a363f174362d86e041d946638bb14af260826689268793a1973a7c748
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6A 13940 bytes