Malicious PDF — malware analysis report

Static analysis result for SHA-256 602482b819023244…

MALICIOUS

PDF

43.0 KB Created: 2020-08-14 16:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93f486bee0d80119197534cc5d50f5e6 SHA-1: 0ce9a0eb44e78e53fc7e20a2a5178f2928b1f1a5 SHA-256: 602482b819023244a5e203298c10b5fdf7eb3cb880a2d07856bf28168e1dd9b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search results or distribute content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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.cc/pify?keyword=automatisme+cardiaque+pdf
    • http://files.goldwelldesigns.com/uploads/1/3/0/7/130776276/7861863.pdf
    • http://files.trimleystmartinprimaryschool.com/uploads/1/3/1/3/131378950/9349767.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6885/8276/files/abbyy_transformer_3._0_crack.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/84887304169.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/xigupukavunux.pdf
    • https://cdn.shopify.com/s/files/1/0433/7519/8373/files/pidolurifibunamufuzipi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9273/6155/files/ielts_speaking_sample_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/ensinamentos_budistas.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/vopikimuxudopaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/92912871809.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/muvekumebinuloj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/duxuto.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/48474874514.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_off00006b90.bin
733d66febc951b64ee1516799a0152a3db4db98cd906633ae181f85f4d8955bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B90 5384 bytes
font_01_sfnt_off00007dc0.bin
6864db72936120774891836ed835fef35970e895f72e956d00cf5ed9ee6ca02c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC0 9988 bytes