Malicious PDF — malware analysis report

Static analysis result for SHA-256 76acada9d453f8c4…

MALICIOUS

PDF

41.3 KB Created: 2020-08-11 19:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc35f7c2f547c7b3819d5b13a739e603 SHA-1: 063bb1845e735c2cbf8e69236bccd8f43082715a SHA-256: 76acada9d453f8c4d2dbf582fa0754e6f158c9e7a0d7367da56104d20f3b9f29
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 28 external PDF links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are part of this link farm. This indicates a likely attempt to drive traffic to malicious sites, potentially for phishing or malware distribution.

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=trastornos+alimenticios+obesidad+pdf
    • http://files.bathbombbootcamp.com/uploads/1/3/0/8/130874108/92c41ac.pdf
    • http://files.deltasurveillance.com/uploads/1/3/0/7/130775786/8916915.pdf
    • http://pipegavev.citizens-medicare.com/uploads/1/3/0/8/130814328/supomejagukip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/56040465587.pdf
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/21926620240.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/werazapasolasosaluz.pdf
    • https://cdn.shopify.com/s/files/1/0438/9617/6795/files/13299711721.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/zazelenozoxomevot.pdf
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/26577462818.pdf
    • https://cdn.shopify.com/s/files/1/0438/1310/9917/files/calculus_early_transcendentals_8th_edition_solutions_manual_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/21182800175.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1829/files/classical_guitar_arpeggio_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2773/files/josededu.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_off000060af.bin
6ffb45d888c358d9b294e27d7a617d3955b9fce3b9fd054608519aa9f12bf6e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 5392 bytes
font_01_sfnt_off000072e1.bin
2c39cb5cebdf7b4d981183151e01d63eb9349ae60071511fe4ca8078c2042650
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E1 11016 bytes