Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acc840a60761b9d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-29 13:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f5549202b1e5ff9fcd13d1bc5575672 SHA-1: 7a71fc1a72be8b9c7e72e67b8b871917ac0eb764 SHA-256: 0acc840a60761b9d3335819f3c768c8d8875bea928bbac02e4c717514e4dae80
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially obfuscated, includes the URL 'https://ttraff.com/wix?keyword=downloadable+wedding+invitations+templates', suggesting a lure to disguise malicious activity. The presence of numerous external PDF links, as indicated by 'PDF_SEO_LINK_FARM', further supports a malicious intent to distribute or redirect to harmful 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/wix?keyword=downloadable+wedding+invitations+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/feduzejud.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/vulamonivawabovijasisipig.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/jojefabebuxubuwevenu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/65242086986.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d907472fcd54df29e0c118fb13c0739.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1071/files/54522786199.pdf
    • https://cdn.shopify.com/s/files/1/0432/1463/5165/files/health_care_assistant_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/gusejikepijusuvepiki.pdf
    • https://cdn.shopify.com/s/files/1/0450/6199/6694/files/comidas_saludables_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/zatore.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/mario_bro_music.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_off00005f72.bin
590843f19e0cdb2060197e9764ac11f3a5078cdeaa621310a2c9478c8dd3bd7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F72 5476 bytes
font_01_sfnt_off00007216.bin
709c46493b46d746ec00481e4d461c0c1b5bb817510f9ab9ca8172715b9bb31d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7216 10188 bytes