Malicious PDF — malware analysis report

Static analysis result for SHA-256 460e93b1dd7f4bdf…

MALICIOUS

PDF

35.3 KB Created: 2020-09-20 16:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e78b03e96f83ec8d93420aa48fe6b15 SHA-1: d1e86fd6a465b8dfa630bfcec777548866a1ec56 SHA-256: 460e93b1dd7f4bdfefd83664140e033c0cfdfa80979f9c6b4659258b199efd30
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'forge of empires apk uptodown' and the PDF's creation tool, suggesting a lure to a potentially malicious download site. The ML classifier strongly supports the malicious verdict.

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.me/wix?keyword=forge+of+empires+apk+uptodown
    • http://files.alaneisenstock.com/uploads/1/3/0/9/130969470/97c5671198234.pdf
    • http://wakoz.paulaszzerts.com/uploads/1/3/1/6/131606901/lubavuxati.pdf
    • http://raxoj.silverstormfarm.club/uploads/1/3/2/6/132681218/0363462de3.pdf
    • http://mefusemij.starfishlearningjourney.com/uploads/1/3/0/8/130874588/d0b228ee0acef.pdf
    • http://files.cincinnatikelts.com/uploads/1/3/0/8/130874222/83073c413af4.pdf
    • http://xiverawi.sheilanonato.com/uploads/1/3/0/8/130814328/javelutazalad.pdf
    • http://files.parentascoachprogram.com/uploads/1/3/1/4/131483662/sidalumedogabafizalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/gipiwipisopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/gujusivujopulorolirugijek.pdf
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/geometric_distribution_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0463/0691/8557/files/10212574647.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_off00004c97.bin
ec61887f8086cc0736db25e7db94a34858c5d30a89afd3ad5046c8554182a7f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C97 5440 bytes
font_01_sfnt_off00005f1c.bin
0827bc5469e7fc62c98b20eefa99d5ad7cb3498b3783241da9126b17811b8cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1C 9896 bytes

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