Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e53440967f7acac…

MALICIOUS

PDF

35.1 KB Created: 2020-08-08 02:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a78ed5378cc816395051d63780aec332 SHA-1: e1e71f1349878465f6e447d3ad2029b45bbf9d18 SHA-256: 5e53440967f7acac560daf5769297eafec70d93203d0be887dc07095f5154431
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with 28 external PDF links, including a critical redirector link to ttraff.com. This suggests the document is designed to drive traffic to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous links, some pointing to benign Shopify URLs, is a common tactic to obscure the malicious intent.

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=avivamento+sustent%25C3%25A1vel+pdf
    • http://wumimepa.anaestheticchecklists.com/uploads/1/3/0/8/130874431/e18a76.pdf
    • http://files.mtairyvillage.com/uploads/1/3/0/8/130814411/54e94.pdf
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdf
    • http://files.pstransport.net/uploads/1/3/1/3/131397973/wipagakenag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/bosquejos_expositivos_para_predicar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/agile_scrum_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/2461/2508/files/pupufa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/latizizagekawizowovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/bidigurugavoxukemumajas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/upload_to_google_sites.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/faniradopolidemurupumebo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/79870181387.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/62491667231.pdf
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/46304547427.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_off0000480b.bin
3c3513c4d0971f07ae9b0663d195a2285985a3fda3efb3a9fd570733f34255b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x480B 5372 bytes
font_01_sfnt_off000059c1.bin
040c52a2eee028570b2f321e7de104f9225d6ec4e5b86f926c6308258689fa1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x59C1 12068 bytes