Malicious PDF — malware analysis report

Static analysis result for SHA-256 484db4f8555363ed…

MALICIOUS

PDF

46.2 KB Created: 2020-08-11 00:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b66b04acb7ad70c0dfa11432fb692b SHA-1: 431bd4562c122a526f1e9e1b35780bd9e4bb0787 SHA-256: 484db4f8555363edc741d30f133bd1880b0e187a6647c01a8f40b4b8a0013e0d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=acido+sulfurico+amelie+nothomb+pdf+gratis`. This URL is likely part of a phishing or scam campaign designed to trick users into downloading further malicious content or revealing sensitive information. The document body also contains this URL, reinforcing the lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing malicious documents.

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=acido+sulfurico+amelie+nothomb+pdf+gratis
    • http://lubajefin.tambowthewombat.com/uploads/1/3/2/6/132695569/bukebotofuso_faperipafaji_widojekokox_luzim.pdf
    • http://panali.help4writing.com/uploads/1/3/0/8/130814229/lezenif.pdf
    • http://topotami.socialandcognitivelearningcenter.com/uploads/1/3/0/7/130740141/debatir.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/11571105894.pdf
    • https://cdn.shopify.com/s/files/1/0429/2267/2284/files/sql_server_2020_dba_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4453/6473/files/25421275459.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/walokexojopujajarawixig.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/xunademekuvomadaratef.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/encyclopdie_du_droit_ohada.pdf
    • https://cdn.shopify.com/s/files/1/0436/0011/7928/files/63846956258.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/dolodituna.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/6924975840.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/11496436226.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/jawoxonakolukakaxewirin.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/potitaxetowi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/2014_honda_crv_repair_manual.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_off00006bec.bin
c0c37746a85c3bcc4a2ea20ebd92d61ba38eb03a05c91b7bac09a0d39ad88783		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEC 5700 bytes
font_01_sfnt_off00007f0e.bin
6a709d63095095153912bbbc2ef567b095cead6a72f7538c472e037289b97e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0E 14412 bytes

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