Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1415078780905ea…

MALICIOUS

PDF

36.4 KB Created: 2020-09-19 16:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a3b3ebaf396e2a588a186899711c8c5 SHA-1: fdeeaaa3539ec5641ece0e46d651d5777c6b3f68 SHA-256: e1415078780905ea65065221e6fffb3c40cec3129ecffa0458f62c17f79ef1b7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with one prominent link pointing to a redirector associated with malicious activity. The primary malicious URL identified is https://ttraff.link/wix?keyword=descargar+kingo+root+apk, which is likely intended to lead the user to download and execute a payload. The document body, though heavily obfuscated, contains references to software downloads, reinforcing the lure.

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.link/wix?keyword=descargar+kingo+root+apk
    • http://files.vance-smith.com/uploads/1/3/2/3/132303410/6527860.pdf
    • http://files.quietgovernmentmen.com/uploads/1/3/1/4/131437566/fadapinedex.pdf
    • http://raledif.fusionlandscapedesign.co.nz/uploads/1/3/0/7/130776007/7899977.pdf
    • http://tawudino.sabco.org/uploads/1/3/0/8/130873995/b2e02e1cb22d3a.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8683/files/91105785087.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6826/files/99153771459.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/urticaria_angioedema_anafilaxia.pdf
    • https://cdn.shopify.com/s/files/1/0439/3772/6622/files/bahaya_rokok_bagi_kesehatan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/jogos_ppsspp_pelo_mega.pdf
    • https://b0f14589-d78e-45a1-b9b6-351d341dea05.filesusr.com/ugd/e0d0cf_8dceeebdca3b4373bc25bd9abde7b82d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/11390432055.pdf
    • https://cdn.shopify.com/s/files/1/0451/4293/3657/files/wilson_medicinal_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/nisukoruvakogusexixepuni.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051bd.bin
0ed3d008511b8336fc70f9475dfa0b746d25d07694c6cdd0954f7d5eac0315e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x51BD 5132 bytes
font_01_sfnt_off00006352.bin
1804af224ebc5fbcf50d6e56c37d52bb01672eb4e9b7cb9b673199862af8def1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 9928 bytes