Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a400d0a4128b8f…

MALICIOUS

PDF

43.4 KB Created: 2020-08-15 05:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c644b4a5e545d6029226ac7d81b97a6 SHA-1: be096422a44ca9b7bd41e379fd0bd04688fbbc4d SHA-256: 78a400d0a4128b8f67e8f62d2257b249ca6308ec4bebecbd40f925acf1cf8e12
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL leading to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a "Grand opening message template". The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the overall structure and URL reputation indicate a phishing or 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.ru/pify?keyword=grand+opening+message+template
    • http://bekox.vbashelbyville.com/uploads/1/3/0/7/130740257/5ff95.pdf
    • http://files.forgegroupajg.ca/uploads/1/3/1/6/131607095/fuzagugarusegiluxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/47959874245.pdf
    • https://cdn.shopify.com/s/files/1/0433/0261/7252/files/mitemanebupoludejegafaju.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/bemasevaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/zanazevuwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/diccionario_biblico_espaol_griego.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1887/files/90045552011.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/solucion_hipotonica.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58585016777.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2994/files/ethics_benedict_de_spinoza.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/12537544165.pdf
    • https://cdn.shopify.com/s/files/1/0431/9769/4114/files/wastewater_treatment_philippines.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_off00006b06.bin
d3fa9bd24bda8e5088f734f01a1cb9aab10519e6c7228beb919078ef1e1e6e37
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B06 5312 bytes
font_01_sfnt_off00007d04.bin
5a4ee03faffb6c3f4e5df3f08dd8004dff7fb0ee3ac2d0c629cb491c4c3e1f34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D04 10632 bytes