Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c38e4457e8b9862…

MALICIOUS

PDF

41.1 KB Created: 2020-08-20 00:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4264bcbe6ac3b7ddc0b98ea49c5e17a5 SHA-1: 2994b6a3ab040444d2cd94a12ce69bb9e64b4174 SHA-256: 5c38e4457e8b9862e9955c5b703f272d6a1a578150d34406bd3edac23a2f3c0a
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, indicating a phishing or scam attempt. The presence of a "download" button lure further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content, likely as part of a phishing campaign.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=tri+fold+restaurant+brochure+template+free
    • http://files.davesartdimensions.com/uploads/1/3/1/6/131606348/vojetiborakupo.pdf
    • http://xejukifon.gillbio.com/uploads/1/3/1/4/131407197/dujazoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/fotabusibudawakezapupijap.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/18670712510.pdf
    • https://cdn.shopify.com/s/files/1/0451/0951/0297/files/taloxiluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/how_to_find_facebook_url.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/edexcel_igcse_human_biology_revision_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/9594/8454/files/21044038831.pdf
    • https://cdn.shopify.com/s/files/1/0465/2957/7118/files/63513796250.pdf
    • https://cdn.shopify.com/s/files/1/0433/8696/2076/files/canoscan_9000f_mark_ii_scan_to.pdf
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/35092565120.pdf
    • https://cdn.shopify.com/s/files/1/0459/2238/6069/files/luxivukezedetesubapowuxom.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/49819465750.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_off000062af.bin
6b4abd15faff05a4baae969a6cf9f7b713701b890ccc43cbe665d0bc9d212e71
pdf-font-stream PDF embedded font (sfnt) at offset 0x62AF 5484 bytes
font_01_sfnt_off00007520.bin
15ec6d4c6af810697f0a1331473c5f02408670fd53ded08278585795a158f02b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7520 10128 bytes