Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e3dec3d745abed…

MALICIOUS

PDF

35.8 KB Created: 2020-08-29 20:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8bc2cf953edb9f8ef1bf022136e50c4 SHA-1: a2aa49429785eedd1291321e24e8e44c6b05f7dc SHA-256: 68e3dec3d745abed12fb551b6f25cf5d32845bfabbe0117be8a4a53f94cf93d8
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous URLs, with one identified as a malicious redirector. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting a payload. While no scripts were directly extracted, the PDF structure and embedded links point towards a malicious intent, likely related to phishing or malware distribution.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=desenhos+dos+reis+magos+reais
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/flautas_de_papa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6177/files/72834088407.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/watch_superbad_123movies.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c9f39ed0de14c4eb5c44c0f4445f9c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dada1dcff33497a9e03ed2b0f4820b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4db59a38d34125ab614f0278647cb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0480742dd71943639538b7cb4bedafa8.pdf
    • https://static.usrfiles.com/ugd/b8c837_832aecef188b4b538cd4dcace800634b.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/analisis_y_diseo_de_puestos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/wigelesobovez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/42874754201.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/gapugikazor.pdf
    • https://static.usrfiles.com/ugd/b8c837_27a585d233e94e27a2dc28e0bd69e478.pdf
    • https://static.usrfiles.com/ugd/de65f7_ade32d78b1ba4203bfba94e77a514687.pdf
    • https://static.usrfiles.com/ugd/b8c837_41e091a9e74441d1ab7d59b58a3b6bc5.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_off00004b82.bin
0555269e95575b760a632255453ec1d736b994a642d46b1ad6a9fc00f8b72181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B82 5204 bytes
font_01_sfnt_off00005d06.bin
c3d69b6405f7e17cac532469b95ca7a3468e7f001d5f9467c29fcd08fda6b71f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D06 11736 bytes

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